Migration 2a7b8c9d0e1f adds target_languages (JSON) to translation_jobs.
Uses ADD COLUMN IF NOT EXISTS for idempotent PostgreSQL deployment.
Fixes 500 error on GET /api/translate/jobs:
column translation_jobs.target_languages does not exist
Migration chain is now clean: 5 linear revisions, no orphans.
- Delete migrate_sqlite_to_postgres.py (one-time script, no longer needed)
- Fix @INVARIANT in mappings.py: SQLite → PostgreSQL
- Remove deprecated source_language column from TranslationJob model
+ Alembic migration 8dd0a93af539 to drop column if exists
- Remove source_language from TranslateJobResponse schema
Fixes recurring 'source_language does not exist' scheduler error
CR1: Add needs_review, language_overridden to translation_languages migration
CR2: Add per_language_metrics to translation_metric_snapshots migration
H1: BulkFindReplaceService.preview() now uses replacement_text (not find pattern)
H2: get_run_records now includes per-language data via selectinload
H3: Preview per-language approve/reject uses correct (jobId, rowId, lang) args
H4: _compute_config_hash now includes target_languages
- Auto-detection of source language per row via LLM (US6)
- Multi-target translation — one LLM call for N languages (US1-US3)
- Language-aware storage: TranslationLanguage, per-language stats
- Multilingual dictionaries with language-pair-aware filtering (US7)
- Inline correction on any run result + submit-to-dictionary (US8)
- Context-aware dictionary: auto-capture row context, usage notes,
Jaccard similarity, priority flagging in LLM prompts (US8b)
- Configurable preview sample size 1-100, cost warning at >30
- Per-language history & metrics with MetricSnapshot preservation
- 36 files, +5022/-373, all specs GRACE-Poly v2.6 compliant
