Phase 4-5: deployable container + corpus snapshot + CI fixes

deploy/docker-compose.yml — replace <product>/<registry> placeholders
with concrete values for Drawbar's stack:
- image: git.jpaul.io/justin/seed-mcp:latest (CF tunnel for pulls; CI
  pushes via LAN 192.168.0.2:1234 to avoid 100 MB body cap)
- container_name: seed-mcp
- port 8001:8000 (8001 host-side to not collide with crop-chem-docs
  on 8000)
- PRODUCT_NAME=crop_seed, hybrid search enabled, stateless HTTP
- llama-rerank shared with crop-chem-docs (NOT redefined here —
  expected to already be in Drawbar's parent compose network)
- networks.drawbar-mcp external: true so seed-mcp joins the existing
  cross-MCP shared network

.gitignore — corpus/ is now COMMITTED, not ignored. The monthly
refresh workflow scrapes and commits corpus changes; the image-only
workflow rebuilds indexes from the committed corpus. Allowing the
corpus to flow through git means the :corpus-YYYY.MM.DD image tag
pins to a specific seed-catalog snapshot. chroma/ and bm25/ remain
ignored — those are deterministically derived from corpus.

Initial committed snapshot: 614 varieties.
- bayer_seeds: 475 (DEKALB 288 + Asgrow 102 + WestBred 85)
- golden_harvest: 139 (Syngenta corn + soy; 36 sitemap URLs
  302-redirected = discontinued)

rag/chunk.py — normalize brand and crop to uppercase/lowercase in
Chroma metadata so cross-vendor brand-filter lookups don't break on
casing inconsistency (Bayer stores "DEKALB", Golden Harvest stores
"Golden Harvest"; _build_where uppercases user-supplied brand which
matched the former but not the latter pre-fix). Sidecar JSON keeps
original casing for display.

Stub scrapers (nk, agripro, becks_pfr, becks_products) — change
return code from 2 to 0 so the monthly-refresh CI workflow doesn't
fail on deferred sources. Real implementations will return 0 on
success / 1 on failure when they ship.

Smoke-tested cross-vendor retrieval against the 614-chunk index:
- list_versions shows both vendors with correct facet counts
- broad "corn hybrid 100 RM" query returns both DEKALB and Golden
  Harvest hits in top 5
- brand='Golden Harvest' filter returns 3 GH-only varieties
- variety-code prefilter still works (E085Z5 → top hit on GH)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

corpus/golden_harvest/golden_harvest-gh2674e3.md

@@ -0,0 +1,58 @@
+# GH2674E3
+
+- **Vendor:** Syngenta
+- **Brand:** Golden Harvest
+- **Crop:** Soybeans
+- **Maturity group:** 2.6
+- **Traits:** E3 (Enlist E3® (2,4-D + glyphosate + glufosinate))
+- **Source:** https://www.goldenharvestseeds.com/products/soybean/gh2674e3
+- **Tech sheet (PDF):** https://assets.syngentaebiz.com/pdf/techsheets/GH2674E3_260310.pdf
+- **Rating scale (Golden Harvest):** 1-9 (9 = best)
+
+---
+## Positioning
+
+Strong East to West Performance with Impressive Yield Potential
+
+## Recommended Management
+
+| Characteristic | Value |
+|---|---|
+| Drought prone | ✓ |
+| High pH | ✓ |
+| Highly productive | ✓ |
+| Variable | ✓ |
+| Poorly drained | ✓ |
+
+## Plant Characteristics
+
+| Characteristic | Value |
+|---|---|
+| Plant height | Medium |
+| Canopy type | Medium |
+| Branching | Moderate |
+| Growth habit | Indeterminate |
+| Flower color | White |
+| Pubescence color | Gray |
+| Pod color | Tan |
+| Hilum color | Buff |
+| Chloride sensitivity | Includer |
+
+## Agronomic Characteristics
+
+| Characteristic | Value |
+|---|---|
+| Seed size | Small |
+| Avg protein % | 33.4 |
+| Avg oil % | 20.3 |
+| Metribuzin response | 5 |
+| Sulfentrazone response | 1 |
+
+## Disease And Pest
+
+| Characteristic | Value |
+|---|---|
+| Phytophthora root rot | Rps1c |
+| Soybean cyst nematode | MR3 |
+| SCN source | PI88788 |
+| RKN–Incognita | - |