- Added new metrics for BEP-51 InfoHash sampling in `metrics.md`.
- Enhanced logging in `main.rs` to include BEP-51 sampling statistics.
- Introduced new fields in `crawl_engine.rs` to manage sampling state.
- Implemented encoding for BEP-51 sampling queries in `krpc.rs`.
- Created a new module `sample_infohashes.rs` to handle BEP-51 sampling logic.
- Updated `peer_lookup.rs` to support requests for sampled InfoHashes.
- Modified `scheduler.rs` to send `PeerLookupRequest` instead of raw info hashes.
- Integrated BEP-51 sampling into the DHT server in `server.rs`.
- Added configuration options for BEP-51 sampling in `types.rs`.
- Updated runtime statistics to track BEP-51 sampling metrics in `runtime_stats.rs`.
chuan
b9b157720d