## Description

RocksDB implicitly schedules 30-day periodic compaction for filtered,
leveled, block-based column families. Pin that behavior for the RPC
bitmap column families and expose an optional node override so
reclamation does not depend on RocksDB auto-tuning.

## Test plan

Unit tests cover option layering, day-to-second conversion, bitmap-CF
targeting, and the two-pass merge reclamation behavior.

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## Release notes

- [ ] Protocol:
- [x] Nodes (Validators and Full nodes): Fullnode operators can override
the embedded RPC store's bitmap periodic-compaction interval. Omission
retains 30 days; zero disables periodic compaction.
- [ ] gRPC:
- [ ] JSON-RPC:
- [ ] GraphQL:
- [ ] CLI:
- [ ] Rust SDK:
- [ ] Indexing Framework: