fix(daemon): suppress unnecessary agent checkpoint traffic

[svarlamov]

Summary

• replace the metrics-database rate-limit lookup with a daemon-local bounded monotonic limiter
• skip read-only and unsupported Claude hook payloads before transcript or repository work
• preserve all mutating Claude file-tool checkpoint behavior

Tests

• limiter expiry, capacity, eviction, and poison fail-open unit coverage
• Claude read-only suppression and mutating-tool preservation coverage
• full task test, task lint, task fmt, and task build on the completed stack

[svarlamov]

• fix(daemon): acknowledge checkpoint admission asynchronously #1982
• fix(daemon): decouple trace ingestion from side effects #1981
• refactor(daemon): add bounded family drain scheduling #1980
• fix(daemon): suppress unnecessary agent checkpoint traffic #1979 👈 (View in Graphite)
• main

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