[P1.5-S6-ARI-43] Populate KB runbooks for UC3 service types

[bjridicodes]

Ticket: P1.5-S6-05

Type: Config | Est: 1d

Goal: FileKnowledgeBase returns correct resource type filters and error keywords for all 4 UC3 native GCP service types.

Scope:

• Update data/knowledge_base/uc3/ (from S4 stub to full runbooks):
  • BigQuery: resource type bigquery_dataset, keywords: jobStatus.errorResult, PERMISSION_DENIED, RESOURCE_EXHAUSTED, tableNotFound, quotaExceeded
  • Cloud Functions: resource type cloud_function, keywords: FunctionException, DEADLINE_EXCEEDED, memory limit exceeded, cold start, function execution took longer than
  • Pub/Sub: resource type pubsub_subscription, keywords: num_undelivered_messages, UNAVAILABLE, push delivery failed, subscription backlog
  • GCS: resource type gcs_bucket, keywords: PERMISSION_DENIED, accessDenied, bucket policy, object not found

Acceptance criteria:

• file_kb.get_log_hints(ci_name, PlatformTag.GCP) returns cloud_function resource type hint for Cloud Function CIs
• Returns pubsub_subscription hint for Pub/Sub CIs
• Returns bigquery_dataset hint for BigQuery CIs
• Returns gcs_bucket hint for GCS CIs
• Unit test: all 4 service types return non-empty LogAccessHint objects