c267f04c00
- Implemented hashline stale-anchor recovery using cached reads and a 3-way merge fallback. - Updated hashline execution and preflight checks to retry mismatched anchors through cache recovery. - Added file-read cache support with per-session LRU snapshots and contiguous/sparse record APIs. - Integrated read and search tools with the shared cache to record candidate lines for recovery. - Added tests for stale-anchor recovery flows and FileReadCache session, null, overlap, and eviction behavior.