RainbowBird 272cdae03b feat(server/otel): restructure observability metrics and add active sessions gauge ... - Moved RateLimitMetrics import path to a more centralized location. - Introduced a new file for active sessions gauge to track user sessions in the database. - Updated index.ts to include new metrics and ensure proper initialization of observability metrics. - Modified various routes and services to utilize the new observability structure. - Added smoke tests for HTTP and WebSocket metrics to ensure proper metric registration and functionality. - Enhanced error handling for metrics reading failures to improve observability.		2026-05-12 23:10:13 +08:00
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ai-context	feat(server/otel): restructure observability metrics and add active sessions gauge	2026-05-12 23:10:13 +08:00