v0.3.0

v0.3.0 — Bridge Phase 1 complete

Completes Phase 1 of the go-rag × MuninnDB bridge: every chunk-retrieval and metadata primitive the bridge consumer needs is now on all four transports (gRPC / REST / MCP / CLI). With BL-005 and BL-006 landing here, all six Phase-1 items (BL-001…BL-006) are shipped.

New in v0.3.0

Chunk metadata — the last two Phase-1 items:

• section_depth — the governing heading's level (1–6) on Chunk + QueryHit; pairs with the existing section_context breadcrumb so a consumer can reconstruct markdown markers without re-scanning the text (BL-005 / spec 041).
• extraction_quality + extraction_method — a per-page coverage-confidence signal (native / mixed / image + a 0–1 score) so consumers can gate promotion of sparse or image-only PDF extraction. Honest about the OCR limit: go-rag is pure-Go and does not OCR, so a scanned PDF with a text layer reads as native (BL-006 / spec 042).

WatchDocuments hardening (spec 040 follow-ups):

• DELETED event now published from Pipeline.DeleteDoc — covers watcher-detected removals and reprocess in one chokepoint.
• DeleteDoc guarded by the pipeline mutex — closes a resurrection TOCTOU (a racing embed write-back could re-create a deleted record) found by the adversarial concurrency audit.
• Bus.Close on Engine.Close — clean subscriber teardown on shutdown; the handler's !ok "engine shutdown" branch is now real.
• stream.Send decoupled from ctx.Done + gRPC keepalive enforcement — a stalled-but-connected client can no longer wedge a handler or leak a subscriber.

Upstream

• MuninnDB #560 (idempotent_id wiring) shipped upstream; #556 (UPSERT) is now unblocked at the prerequisite level — the proto comment is posted, awaiting maintainer response.

Full Changelog: v0.2.2...v0.3.0