phase: 126_pdf_support

All gates verified green — no code changes were needed on this pass. Final report:

## Phase 126 — PDF support: final verification pass

**Verified (all tasks 01–05 already complete in working tree):**
- `pymupdf` dep in `pyproject.toml`/`uv.lock`; `.env.example` documents the `pdf` token
- `app/rag/pdf.py` (text + image extraction, MIME mapping), page-aware `_chunk_pdf`, importer `_index_pdf_file` + embedded-image pass, archives covered via extension walk

**Test / lint / coverage results:**
- `uv run pytest` → 2997 passed
- `uv run pytest tests/e2e/test_pdf_support.py -v --no-cov` (isolation) → 6 passed
- `uv run pytest --cov=app --cov-report=term-missing` → TOTAL **99%** (>90% gate), 2997 passed
- `uv run ruff check . && uv run pyright` → clean (0 errors)

**Completion criteria:**
1. PDF → doc with text/chunks/embedding/summary — ✅ (integration + E2E Sources-page tests)
2. `BOR_IMAGES=true`: embedded images → standalone image docs — ✅ (integration + E2E chat-chip test)
3. `BOR_IMAGES=false`: images skipped, text indexed — ✅ (both suites)
4. PDF renders as extracted text in viewer — ✅ (E2E)
5. Test/coverage/lint gates — ✅ (above)
6. Commit + phase move — harness handles (per protocol, no `git` on this pass)

**Decisions:** none new; inline `[Embedded image: …]` placeholders were a documented task-04 deviation (simplified spec wins) — not a defect. No defects found; repo left functional with changes in the working tree.

**Next pending phase:** none — `todo/` is empty once 126 is moved.

uv.lock

@@ -61,6 +61,7 @@ dependencies = [
     { name = "psycopg", extra = ["binary"] },
     { name = "pydantic" },
     { name = "pydantic-settings" },
+    { name = "pymupdf" },
     { name = "python-dotenv" },
     { name = "python-multipart" },
     { name = "sqlalchemy" },
@@ -88,6 +89,7 @@ requires-dist = [
     { name = "psycopg", extras = ["binary"], specifier = ">=3.1,<4.0" },
     { name = "pydantic", specifier = ">=2.7,<3.0" },
     { name = "pydantic-settings", specifier = ">=2.3,<3.0" },
+    { name = "pymupdf", specifier = ">=1.24,<2.0" },
     { name = "python-dotenv", specifier = ">=1.0,<2.0" },
     { name = "python-multipart", specifier = ">=0.0.9,<0.1" },
     { name = "sqlalchemy", specifier = ">=2.0,<2.1" },
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