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/epa_ppls/100-891.md

@@ -0,0 +1,128 @@
+# MERTECT DF FUNGICIDE
+
+- EPA Reg No: **100-891**
+- Registrant: SYNGENTA CROP PROTECTION, LLC
+- Signal word: Warning
+- Active ingredients: Thiabendazole (89%)
+- Label accepted: 1993-10-12
+- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/000618-00092-19931012.pdf
+
+---
+" 
+'. 
+.1 
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+• 
+17Dite4 Stat •• BDviro .... nt.l Protection AgeDCY 
+".biDgt.Ga. D.C. 20.'0 
+Margaret Waters 
+MBRCIt " CO INC 
+AGBNT FOR: MBRClt " CO INC' 
+HILLSBOROUGH RD 
+THREB BRIDGES NJ OSSe7 
+Office of 
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+Subject: Label Amendment Submission of 06/10/93 
+. in Compliance with WPS Labeling Requirements 
+BPA Reg No. 61S-92 
+MBRTBCT DF FUNGICIDB 
+• 
+Dear Reglstrant: • 
+The labeling cited above and submitted in connection 
+with registration under the Federal Insecticide. Fungicide, 
+and Rodenticlde Act, as amended, is accepted subject to the 
+conmentto lisl;ed below. 
+Based on your certification, the Agency has accepted 
+only those changes to your lc~ling which are necessary to 
+comply:with PR Notices.93~7 and 93-11, which reflect the WPS 
+labeling requirements of 40 en part 156, subpart It. Any 
+other labeling cbanges su:~tted in connection with this . 
+amendment application and not directly related to compliance 
+with PR Notice 93-7 or 93-11 have neither been reviewed nor 
+accepted by the Agency. If you wish to make any such 
+changes, you must submit a separate amendment application 
+proposing them. If your product registration is currently 
+suspended, acceptance of this labeling amendment does not 
+affect the suspension in any way. 
+A copy of your proposed labeling stamped ·Accepted with 
+comments· is attached. Make any required changes described 
+in the attached and send three copies of final labeling as 
+soon as it is available to: .' 
+t r
+
+• 
+.' 
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+t, 
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+NlRCIC • co IRe 
+NlaftC'l' DF FUNGICIDB )- 1 
+618·'2 06/10/'3 
+Original SutDi •• i_ ~,. 
+Add the following .tat ... nt to your label: "Di.card clothing and other 
+u,.orbeDt _t.rial. that have been 4nncbed or heavily CCXltaainated with 
+tbJ.. product'. c:oncentrate. Do ~ nuH ~ •• "feZ' to pqe 20 of the 
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