fix: cap distinct user-agents per endpoint in GrpcUsageTracker - #26778

3 files  ±0  3 suites  ±0   15m 47s ⏱️ +2s
8 tests ±0  8 ✅ ±0  0 💤 ±0  0 ❌ ±0 
9 runs  ±0  9 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit eb695f6. ± Comparison against earlier commit b7a4df6.