docker: production image + Gitea Actions for monthly refresh

Dockerfile: self-contained image with corpus + Chroma + BM25 baked
in. Drawbar's compose pulls + runs without volume mounts. Built from
sources.json (labels schema), PRODUCT_NAME=crop_chem by default,
HYBRID_SEARCH=true (always-on for production quality). RERANK_URL +
OLLAMA_URL get set at compose time.

.gitea/workflows/refresh.yml: monthly cron (1st @ 06:00 UTC) does
full scrape → reindex → image push. Scrapes Bayer (~30 min) +
EPA PPLS row-crop filtered (~7h). Skips reindex+push if no corpus
diff. Tags pushed: :latest, :<sha12>, :corpus-<YYYY.MM.DD>.

.gitea/workflows/image-only.yml: on-demand or auto on code-only
pushes to main (paths: docs_mcp/, rag/, scrape/, requirements.txt,
Dockerfile, sources.json). Reindexes from committed corpus, builds
image, pushes. ~10 min vs ~9h full refresh.

.gitignore: corpus/ now COMMITTED (4,159 labels, 265 MB of .md +
sidecars). Lets image-only.yml rebuild indexes without re-scraping.
chroma/ + bm25/ still gitignored (regenerable binary indexes).

.dockerignore: drops venv, eval results, PLAN/README/CLAUDE.md,
deploy/, .git/ — keeps the image lean. corpus + chroma + bm25
explicitly NOT in dockerignore (those go INTO the image).

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

corpus/bayer/harness-xtra.md

@@ -0,0 +1,95 @@
+# Harness Xtra Herbicide
+
+- **Product class:** herbicide
+- **EPA Reg No:** 524-480
+- **Active ingredients:** Acetochlor, 2-chloro-N-ethoxymethyl-N-(2-ethyl-6-methylphenyl)acetamide, Atrazine (2-chloro-4-ethylamino)-6-(isopropylamino)-s-triazine
+- **Source:** https://www.cropscience.bayer.us/crop-protection/herbicide/harness-xtra-herbicide
+- **Label PDF:** https://cs-assets.bayer.com/is/content/bayer/Harness-Xtra_2025pdf
+
+---
+
+A Pre-mix with Broad-spectrum Weed Control
+Registered Crops
+• Field Corn
+• Production Seed Corn
+• Corn Silage
+• Sweet Corn
+• Popcorn
+• Miscanthus or other
+    non-food bioenergy
+    crops
+Key Pests
+• Waterhemp
+• Foxtail Species
+• Barnyardgrass
+• Velvetleaf
+• Common
+    Lambsquarters
+• Crabgrass Species
+• Common Ragweed
+Harness
+®
+ Xtra herbicide is a premix of acetochlor
+(4.3 lbs ai/gal) and atrazine (1.7 lbs ai/gal) that offers
+a broad spectrum of weed control in corn, including
+more than 35 grass and broadleaf weed species.
+Harness Xtra herbicide provides excellent control in all
+tillage situations and is formulated to deliver a flexible
+rate range of acetochlor and atrazine. In addition, this
+product has a flexible application window including
+preplant, preemergence, and early postemergence in
+corn up to 11 inches.
+/// BENEFITS
+•  Powerful Weed Control
+A premix of acetochlor (4.3 lbs ai/gal) and atrazine
+(1.7 lbs ai/gal) for broad spectrum control of annual
+grasses and broadleaf weed species
+•  Tillage Flexibility
+Provides excellent control in all tillage and no-till
+situations
+•  Application Flexibility
+Flexible application window including preplant,
+preemergence, and early postemergence in corn
+up to 11 inches
+•  Strong Tank Mix Partner
+Strong tank-mix partner with other
+portfolio offerings
+Formulation Information
+• Acetochlor  (4.3 lbs ai/gal)
+• Atrazine (1.7 lbs ai/gal)
+• Suspoemulsion
+
+ALWAYS READ AND FOLLOW PESTICIDE LABEL DIRECTIONS.
+Balance® Flexx, Corvus® and Harness® Xtra Herbicide are restricted use pesticides. Not all products are registered for use in all
+states and may be subject to use restrictions. The distribution, sale, or use of an unregistered pesticide is a violation of federal
+and/or state law and is strictly prohibited. Check with your local dealer or representative for the product registration status in your
+state. Bayer, Bayer Cross, Corvus® and Roundup PowerMAX® are registered trademarks of Bayer Group. For additional product
+information call toll-free 1-866-99-BAYER (1-866-992-2937) or visit our website at www.BayerCropScience.us. Bayer CropScience
+LP, 800 North Lindbergh Boulevard, St. Louis, MO 63167. ©2025 Bayer Group. All rights reserved.
+IMPORTANT: This bulletin is not intended to provide adequate information for
+use of these products. Read the label before using these products. Observe
+all label directions and precautions while using these products.
+ For more information on herbicide group numbers and site-of-action options, visit IWillTakeAction.com
+Application Rate 1.8 to 2.7 qts/A
+Application Timing
+Preplant, Preemergence,
+Early Postemergence
+(up to 11” corn)
+Site-of-Action Group* 5    15
+Recommended
+Tankmix Options
+Balance Flexx
+®
+    27herbicide
+Corvus
+®
+  2
+
+27
+herbicide
+Roundup
+PowerMAX
+®
+ 3     9
+herbicide
+LEARN MORE