fix: harden CI and metadata stability (#48)
* feat: dead code removal, profling foudnation improvements, addressing code smells in reference db implementation
* fix: test fixes and optimmizations for benchmarks
* fix: harden audit findings
Reject invalid tokenizer ids, fix move-order hazards, bound manifest
and audio IO, and guard numeric/process edge cases found by Fold.
* fix: route SymSpell writes through coordinator
* test: fix batch content initializers
* fix(ci): restore cross-platform builds
* fix: address Copilot review findings
771deebc84