Adds the persistence foundation for the AI content-analysis worker:
- Migration 0025: page_analysis (status + scene + is_nsfw + weighted
search_doc tsvector), page_ocr_text (kind-tagged pieces), global
page_auto_tags (shared tags vocabulary, separate from per-user
page_tags), and page_content_warnings (closed vocabulary).
- domain::page_analysis: AnalysisStatus/OcrKind/ContentWarning enums with
kind->tsvector-weight mapping and lenient model-string parsing, plus the
VisionAnalysis response DTOs.
- JobPayload::AnalyzePage { page_id, force } + KIND_ANALYZE_PAGE, reusing
the existing crawler_jobs queue.
- repo::page_analysis: enqueue_for_page, load, mark_failed, and the single
transactional persist_analysis (delete+reinsert; idempotent; never
touches user page_tags; computes the A/B/C/D-weighted search_doc).
Tests: repo integration (persist/idempotency/user-tags-untouched/enqueue/
mark_failed/speech>sfx ranking) + unit (weights, parsing, DTO, job serde).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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