deploy: feature/audiobook@f1c0d35 (fix batch — models/providers, TTS $0, grants, DB admins, delete-hardening)

deploy: reader-access security hardening (feature/audiobook@06a5ed8)

deploy: feature/audiobook bea0cbc

deploy: cost free-tier accounting fix

deploy: real page counts in /audio/voices + ratings

deploy: /audio/voices per-book voice status + Supertonic provider

deploy: audiobook subsystem + encode int16 fix + R2 page fast-path + costs breakdown + query-run flow

feat(audiobook): additive TTS generation + serving (first slice)

fix(history): surface runId + createdAt on GET /query/runs/{id}

fix(history): surface authoritative cost on committed runs (UX-gate)

Deploy hardened backend (rewrite/api @ c81e0b6)

perf: per-thread Turso connection reuse (12s->3s book detail); security: redact local_path filesystem leak

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