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-g01u74.md

@@ -0,0 +1,87 @@
+# G01U74
+
+- **Vendor:** Syngenta
+- **Brand:** Golden Harvest
+- **Crop:** Corn
+- **Relative maturity:** 101
+- **Source:** https://www.goldenharvestseeds.com/products/corn/g01u74
+- **Tech sheet (PDF):** https://assets.syngentaebiz.com/pdf/techsheets/G01U74_260310.pdf
+- **Rating scale (Golden Harvest):** 1-9 (9 = best)
+
+---
+## Positioning
+
+Tremendous Yield Potential with Exceptional Adaptability Across Various Soil Types
+
+## Disease Ratings
+
+| Characteristic | Value |
+|---|---|
+| Gray Leaf Spot | 7 |
+| Northern Corn Leaf Blight | 6 |
+| Goss's Wilt | 6 |
+| Bacterial Corn Leaf Streak | 8 |
+| Southern Corn Leaf Blight | 5 |
+| Anthracnose Stalk Rot | 6 |
+| Tar Spot | 6 |
+| Fusarium Crown Rot | 6 |
+| Common Rust | - |
+| Southern Rust | - |
+
+## Agronomic Characteristics
+
+| Characteristic | Value |
+|---|---|
+| Emergence | 8 |
+| Seeding vigor | 8 |
+| Root strength | 8 |
+| Stalk strength | 8 |
+| Green snap | 7 |
+| Stay green | 6 |
+| Drydown | 7 |
+| TestWeight | 8 |
+| Drought | 9 |
+
+## Recommended Management
+
+| Characteristic | Value |
+|---|---|
+| Continuous corn | ✓ |
+| Fungicide response | ✓ |
+| High pH soils | ✓ |
+| Highly productive soils | ✓ |
+| Coarse-textured soils | ✓ |
+| Medium-textured soils | ✓ |
+| Fine-textured soils | ✓ |
+
+## Plant/Ear Characteristics
+
+| Characteristic | Value |
+|---|---|
+| Plant height | 4-Moderately Tall |
+| Ear placement | 6-Moderately Low |
+| Ear flex | Semi-Flex |
+| Cob color | Pink |
+| Leaf type | Upright |
+| Root type | Penetrating |
+
+## Maturity Info
+
+| Characteristic | Value |
+|---|---|
+| Relative maturity | 101 |
+| Silk RM | 100 |
+| Black layer RM | 101 |
+| Silk GDU | 1350 |
+| Black layer GDU | 2495 |
+
+## Seeding Rates
+
+| Characteristic | Value |
+|---|---|
+| Yield Environment | Target Seeds / Ac |
+| 300 bu/Ac | 38,500 |
+| 260 bu/Ac | 36,000 |
+| 220 bu/Ac | 33,500 |
+| 190 bu/Ac | 31,500 |
+| 150 bu/Ac | 29,000 |