Implement Week 2 metadata extraction and cache database

Week 1 fixes:
- Move hex to workspace dependencies
- Add cargo-criterion, protobuf, grpcurl to flake.nix

Week 2 implementation:
- musicfs-metadata: MetadataParser with symphonia 0.5 for FLAC, MP3,
  Opus/Vorbis, M4A/AAC (2 tests)
- musicfs-cache: SQLite schema per architecture 4.3.6 with track/disc
  columns, TEXT content_hash, all required indexes
- musicfs-cache/db.rs: Database with upsert, CRUD, mtime lookup (9 tests)
- musicfs-cache/metadata.rs: MetadataCache with store/lookup/is_fresh/
  invalidate (2 tests)
- musicfs-core: Added Metadata error variant

22 tests pass total. Oracle-verified against architecture doc.

This commit is contained in:

Alexander

2026-05-12 18:15:44 +02:00

parent 76856b893a

commit d664439746

13 changed files with 1289 additions and 12 deletions

									
										musicfs/crates/musicfs-cache/src/lib.rs
									
		+5
		-1
	
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				#![allow(dead_code)]

				mod db;

				mod metadata;

				pub use db::Database;

				pub use metadata::MetadataCache;