feat(collector): add Lenovo XCC profile to skip noisy snapshot paths

Lenovo ThinkSystem SR650 V3 (and similar XCC-based servers) caused
collection runs of 23+ minutes because the BMC exposes two large high-
error-rate subtrees in the snapshot BFS:

  - Chassis/1/Sensors: 315 individual sensor members, 282/315 failing,
    ~3.7s per request → ~19 minutes wasted. These documents are never
    read by any LOGPile parser (thermal/power data comes from aggregate
    Chassis/*/Thermal and Chassis/*/Power endpoints).

  - Chassis/1/Oem/Lenovo: 75 requests (LEDs×47, Slots×26, etc.),
    68/75 failing → 8+ minutes wasted on non-inventory data.

Add a Lenovo profile (matched on SystemManufacturer/OEMNamespace "Lenovo")
that sets SnapshotExcludeContains to block individual sensor documents and
non-inventory Lenovo OEM subtrees from the snapshot BFS queue. Also sets
rate policy thresholds appropriate for XCC BMC latency (p95 often 3-5s).

Add SnapshotExcludeContains []string to AcquisitionTuning and check it
in the snapshot enqueue closure in redfish.go.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

internal/collector/redfish.go

@@ -345,8 +345,9 @@ func (c *RedfishConnector) Collect(ctx context.Context, req Request, emit Progre
 				"manager_critical_suffixes": acquisitionPlan.ScopedPaths.ManagerCriticalSuffixes,
 			},
 			"tuning": map[string]any{
-				"snapshot_max_documents": acquisitionPlan.Tuning.SnapshotMaxDocuments,
-				"snapshot_workers":       acquisitionPlan.Tuning.SnapshotWorkers,
+				"snapshot_max_documents":     acquisitionPlan.Tuning.SnapshotMaxDocuments,
+				"snapshot_workers":           acquisitionPlan.Tuning.SnapshotWorkers,
+				"snapshot_exclude_contains":  acquisitionPlan.Tuning.SnapshotExcludeContains,
 				"prefetch_workers":       acquisitionPlan.Tuning.PrefetchWorkers,
 				"prefetch_enabled":       boolPointerValue(acquisitionPlan.Tuning.PrefetchEnabled),
 				"nvme_post_probe":        boolPointerValue(acquisitionPlan.Tuning.NVMePostProbeEnabled),
@@ -1343,6 +1344,11 @@ func (c *RedfishConnector) collectRawRedfishTree(ctx context.Context, client *ht
 		if !shouldCrawlPath(path) {
 			return
 		}
+		for _, pattern := range tuning.SnapshotExcludeContains {
+			if pattern != "" && strings.Contains(path, pattern) {
+				return
+			}
+		}
 		mu.Lock()
 		if len(seen) >= maxDocuments {
 			mu.Unlock()

internal/collector/redfishprofile/matcher_test.go

@@ -326,6 +326,47 @@ func TestBuildAnalysisDirectives_SupermicroEnablesStorageRecovery(t *testing.T)
 	}
 }
 
+func TestMatchProfiles_LenovoXCCSelectsMatchedModeAndExcludesSensors(t *testing.T) {
+	match := MatchProfiles(MatchSignals{
+		SystemManufacturer:  "Lenovo",
+		ChassisManufacturer: "Lenovo",
+		OEMNamespaces:       []string{"Lenovo"},
+	})
+	if match.Mode != ModeMatched {
+		t.Fatalf("expected matched mode, got %q", match.Mode)
+	}
+	found := false
+	for _, profile := range match.Profiles {
+		if profile.Name() == "lenovo" {
+			found = true
+			break
+		}
+	}
+	if !found {
+		t.Fatal("expected lenovo profile to be selected")
+	}
+
+	// Verify the acquisition plan excludes noisy Lenovo-specific snapshot paths.
+	plan := BuildAcquisitionPlan(MatchSignals{
+		SystemManufacturer:  "Lenovo",
+		ChassisManufacturer: "Lenovo",
+		OEMNamespaces:       []string{"Lenovo"},
+	})
+	wantExcluded := []string{"/Sensors/", "/Oem/Lenovo/LEDs/", "/Oem/Lenovo/Slots/"}
+	for _, want := range wantExcluded {
+		found := false
+		for _, ex := range plan.Tuning.SnapshotExcludeContains {
+			if ex == want {
+				found = true
+				break
+			}
+		}
+		if !found {
+			t.Errorf("expected SnapshotExcludeContains to include %q, got %v", want, plan.Tuning.SnapshotExcludeContains)
+		}
+	}
+}
+
 func TestMatchProfiles_OrderingIsDeterministic(t *testing.T) {
 	signals := MatchSignals{
 		SystemManufacturer: "Micro-Star International Co., Ltd.",

internal/collector/redfishprofile/profile_lenovo.go

@@ -0,0 +1,65 @@
+package redfishprofile
+
+func lenovoProfile() Profile {
+	return staticProfile{
+		name:            "lenovo",
+		priority:        20,
+		safeForFallback: true,
+		matchFn: func(s MatchSignals) int {
+			score := 0
+			if containsFold(s.SystemManufacturer, "lenovo") ||
+				containsFold(s.ChassisManufacturer, "lenovo") {
+				score += 80
+			}
+			for _, ns := range s.OEMNamespaces {
+				if containsFold(ns, "lenovo") {
+					score += 30
+					break
+				}
+			}
+			// Lenovo XClarity Controller (XCC) is the BMC product line.
+			if containsFold(s.ServiceRootProduct, "xclarity") ||
+				containsFold(s.ServiceRootProduct, "xcc") {
+				score += 30
+			}
+			return min(score, 100)
+		},
+		extendAcquisition: func(plan *AcquisitionPlan, _ MatchSignals) {
+			// Lenovo XCC BMC exposes Chassis/1/Sensors with hundreds of individual
+			// sensor member documents (e.g. Chassis/1/Sensors/101L1). These are
+			// not used by any LOGPile parser — thermal/power data is read from
+			// the aggregate Chassis/*/Thermal and Chassis/*/Power endpoints. On
+			// a real server they largely return errors, wasting many minutes.
+			// Lenovo OEM subtrees under Oem/Lenovo/LEDs and Oem/Lenovo/Slots also
+			// enumerate dozens of individual documents not relevant to inventory.
+			ensureSnapshotExcludeContains(plan,
+				"/Sensors/",               // individual sensor docs (Chassis/1/Sensors/NNN)
+				"/Oem/Lenovo/LEDs/",       // individual LED status entries (~47 per server)
+				"/Oem/Lenovo/Slots/",      // individual slot detail entries (~26 per server)
+				"/Oem/Lenovo/Metrics/",    // operational metrics, not inventory
+				"/Oem/Lenovo/History",     // historical telemetry
+				"/Oem/Lenovo/ScheduledPower", // power scheduling config
+				"/Oem/Lenovo/BootSettings/BootOrder", // individual boot order lists
+				"/PortForwardingMap/",     // network port forwarding config
+			)
+			// Lenovo XCC BMC is typically slow (p95 latency often 3-5s even under
+			// normal load). Set rate thresholds that don't over-throttle on the
+			// first few requests, and give the ETA estimator a realistic baseline.
+			ensureRatePolicy(plan, AcquisitionRatePolicy{
+				TargetP95LatencyMS:      2000,
+				ThrottleP95LatencyMS:    4000,
+				MinSnapshotWorkers:      2,
+				MinPrefetchWorkers:      1,
+				DisablePrefetchOnErrors: true,
+			})
+			ensureETABaseline(plan, AcquisitionETABaseline{
+				DiscoverySeconds:     15,
+				SnapshotSeconds:      120,
+				PrefetchSeconds:      30,
+				CriticalPlanBSeconds: 40,
+				ProfilePlanBSeconds:  20,
+			})
+			addPlanNote(plan, "lenovo xcc acquisition extensions enabled: noisy sensor/oem paths excluded from snapshot")
+		},
+	}
+}

internal/collector/redfishprofile/profiles_common.go

@@ -56,6 +56,7 @@ func BuiltinProfiles() []Profile {
 		supermicroProfile(),
 		dellProfile(),
 		hpeProfile(),
+		lenovoProfile(),
 		inspurGroupOEMPlatformsProfile(),
 		hgxProfile(),
 		xfusionProfile(),
@@ -226,6 +227,10 @@ func ensurePrefetchPolicy(plan *AcquisitionPlan, policy AcquisitionPrefetchPolic
 	addPlanPaths(&plan.Tuning.PrefetchPolicy.ExcludeContains, policy.ExcludeContains...)
 }
 
+func ensureSnapshotExcludeContains(plan *AcquisitionPlan, patterns ...string) {
+	addPlanPaths(&plan.Tuning.SnapshotExcludeContains, patterns...)
+}
+
 func min(a, b int) int {
 	if a < b {
 		return a

internal/collector/redfishprofile/types.go

@@ -53,16 +53,17 @@ type AcquisitionScopedPathPolicy struct {
 }
 
 type AcquisitionTuning struct {
-	SnapshotMaxDocuments int
-	SnapshotWorkers      int
-	PrefetchEnabled      *bool
-	PrefetchWorkers      int
-	NVMePostProbeEnabled *bool
-	RatePolicy           AcquisitionRatePolicy
-	ETABaseline          AcquisitionETABaseline
-	PostProbePolicy      AcquisitionPostProbePolicy
-	RecoveryPolicy       AcquisitionRecoveryPolicy
-	PrefetchPolicy       AcquisitionPrefetchPolicy
+	SnapshotMaxDocuments    int
+	SnapshotWorkers         int
+	SnapshotExcludeContains []string
+	PrefetchEnabled         *bool
+	PrefetchWorkers         int
+	NVMePostProbeEnabled    *bool
+	RatePolicy              AcquisitionRatePolicy
+	ETABaseline             AcquisitionETABaseline
+	PostProbePolicy         AcquisitionPostProbePolicy
+	RecoveryPolicy          AcquisitionRecoveryPolicy
+	PrefetchPolicy          AcquisitionPrefetchPolicy
 }
 
 type AcquisitionRatePolicy struct {