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/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.",