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()