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issue: https://github.com/milvus-io/milvus/issues/46651 <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Enhancement: Add Context-Aware Logging for Proxy and RootCoord Meta Table Operations **Core Invariant**: All changes maintain existing cache behavior and state transition logic by purely enhancing observability through context-aware logging without modifying control flow, return values, or data structures. **Logic Simplified Without Regression**: - Removed internal helper method `getFullCollectionInfo` from MetaCache by inlining its logic directly into GetCollectionInfo, eliminating an unnecessary abstraction layer while preserving the exact same cache-hit/miss and fetch-or-update paths - This consolidation has no impact on behavior because the helper was only called from one location and the inlined logic executes identically **Enhanced Logging for Observability (No Behavior Changes)**: - Added context-aware logging (log.Ctx(ctx)) to cache miss scenarios and timestamp comparisons in proxy MetaCache, enabling request tracing without altering cache lookup logic - Expanded RootCoord MetaTable's internal helper method signatures to propagate context for contextual logging across collection lifecycle events (begin truncate, update state, remove names/aliases, delete from collections map), while keeping all call sites and state transitions unchanged - Enhanced DescribeCollection logging in proxy to capture request scope (role, database, collection IDs, timestamp) and response schema at operation boundaries **Type**: Enhancement focused on improved observability. All modifications are strictly additive logging; no data structures, caching strategies, or core logic paths were altered. <!-- end of auto-generated comment: release notes by coderabbit.ai --> Signed-off-by: bigsheeper <yihao.dai@zilliz.com>