Implement Week 4 CAS store with chunk deduplication and LRU eviction

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- Add musicfs-cas crate: CasStore, ChunkHash, FileReader, ChunkManifest
- Add LruEviction policy to musicfs-cache for cache size management
- Integrate FileReader into FUSE filesystem for actual file reads
- Use xxHash64 for content hashing, sled for index, msgpack serialization
- Default cache path: ~/.cache/musicfs/chunks/ with 256 subdirs sharding
- 20 new tests (14 CAS unit + 3 integration + 3 eviction), 54 total

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Alexander

2026-05-12 18:43:39 +02:00

parent d9e5e06166

commit ffbb238633

15 changed files with 2204 additions and 14 deletions

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docs/v2/plans/week-04-cas-caching.md

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