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/5905-197.md

@@ -0,0 +1,163 @@
+# HELENA BRAND GRAIN PRESERVER
+
+- EPA Reg No: **5905-197**
+- Registrant: HELENA AGRI-ENTERPRISES, LLC, D/B/A HELENA CHEMICAL COMP
+- Signal word: Caution
+- Active ingredients: Vinegar (60%); Propionic acid (40%)
+- Label accepted: 1972-10-12
+- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/005905-00197-19721012.pdf
+
+---
+C AUT ION: KEEP OUT OF REACH OF 
+CHILDREN. 
+DANGER: Liquid causes eye injuries and skin burns. 
+Do not get on skin. in eyes. or on clothing. Breath 
+ing of vapors m.l y be harmful. A void breathing 
+vapors or mist. Harmful if swallowed. In case of 
+contact with eyes or skin. immediately flush with 
+plenty of water for at least 11 minutes. For eyes. 
+get mcdic.ll artention. Remove contaminated cloth­
+ing and shoes at once. Wash thoroughly before re­
+use. 
+Do not contaminate water by cleaning of equipment 
+or disposal of wastes. 
+Apply this product only as specified on this label. 
+DO NOT USE. POUR. SPILL OR STORE NEAR 
+HEA T OR OPEN FLAME. 
+ACCE.PTED=,: 
+(
+" ___ I 
+\., 1 I '.!- i 
+" ."- ) " . I , 
+BRAND 
+R IN PRE ER ER 
+AN INHIBITOR FOR CONTROL OF MOLDS 
+AND FUNGI IN HIGH-MOISTURE STORED 
+CORN. OATS. BARLEY. \VHEAT OR SOR­
+GHUM TO BE USED AS LIVESTOCK FEED. 
+CAUTION: KEEP OUT OF REACH OF 
+CHILDREN. 
+ACTIVE INGREDIENTS: 
+Acetic Acid 
+Propionic Acid 
+TOTAL 
+60% 
+40% 
+100% 
+DIRECTIC 
+I. Determine moisture 
+wheat ur sorghum. 
+-, _. Apply HELENA ~ 
+VER to freshly ha* 
+ture content accordi, 
+! 
+MOISTURE U.S. GAlld 
+CONTENT OF GRAIN BRAND ~ 
+,; BY WEIGHT VER p~ 
+15-20 
+21-25 
+26-30 
+MOIS 
+31·35 " 
+l. Apply in manner l 
+.lnd coverage of grJ~ 
+4. Usc of auger IS re~ 
+to storage. 
+WARRANTY AND LI 
+Helena Chem ical Compa 
+conforms to the chemi,al 
+reasonably fit for the purl 
+ions for Usc and Conditic 
+ent risks referred to ther~ 
+makes no oth:-r express I 
+.1nY other express or implj 
+MERCHANT ABILITY~ 
+ical Comp.lIlY is authori~ , 
+with .1 specific reference 11 
+arising from a breach of , 
+direct d.lInages. and sh.lll i 
+mercial damages such as I, 
+RINSE EMPTY CO 
+\VITH WATER. 
+, 
+'r""Io."'" 1I.T~""'r"'" .............. yro. ........................... T'"
+
+UT OF REACH OF 
+. EN. 
+ljuries and skin burns. 
+on clothing. Breath­
+ul. A void breathing 
+wallowed. I n case of 
+Imediately flush with 
+:; minute,. For eves. , 
+re contaminated c1oth­
+thoroughl y before re-
+cleaning of equipment 
+lecified on this label. 
+.L OR STORE NEAR 
+I 
+I 
+~ \ 
+DE \i 
+CT .. 
+~R· \1 
+-' 
+I 
+BRAND 
+PRE RVER 
+AN INHIBITOR FOR CONTROL OF MOLDS 
+AND FUNGI IN HIGH-MOISTURE STORED 
+CORN. OATS. BARLEY. WHEAT OR SOR­
+GHUM TO BE USED AS LIVESTOCK FEED. 
+CAUTION: KEEP OUT OF R~kutl OF 
+CHILDREN. 
+ACTIVE INGREDIENTS: 
+Acetic Acid 
+Propionic Acid 
+TOTAL 
+60% 
+40% 
+100% 
+DIRECTIONSFOR USE 
+I. Determine moisture content of corn. oats. barley. 
+wheat or sorghum . 
+2. Apply HELENA BRAND GRAIN PRESER­
+VER to freshly harvested grain based on mois­
+ture content according to the following table: 
+MOISTURE U.S. GAllONS OF HELENA POUNDS OF HELENA 
+CONTENT OF GRAIN BRAND GRAIN PRESER· BRAND GRAIN PRESER· 
+.; BY WEIGHT VER PER TON OF VER PER TON OF 
+MOIST GRAIN MOIST GRAIN 
+15·20 
+21·25 
+26·30 
+31·35 
+2.3 
+3.0 
+3.8 
+4.4 
+18 
+24 
+30 
+35 
+~. Apply 10 manner to achieve thorough mixing 
+;\Od coverage of grain. 
+4. US" of auger is recommended to convey grain 
+to storage. 
+WARRANTY AND LIMIT A TION OF DAMAGES. 
+Helena Chemical Company warrants that this material 
+conforms to the chemical description on the label and is 
+reasonably fit for the purposes referred to in the Descript­
+ions for Use ,lIld Conditions of Sale. subject to the inher­
+ent risks referred to therei'1. Helena Chemical Company 
+makes no oth~r express or implied warranty. including 
+any other express or implied ~\'Jrranty of FITNESS or of 
+MERCf !,\J-JT ABILITY. and no~gent of Helena Chem­
+ic,11 Comp.lIlY is authorized to do so except in writing. 
+with a specific reference to thi .. warranty. Any damages 
+.uising from a breach of tbis w.1rranty shall be limited to 
+direct d.1mages. and sh.111 not include consequential com­
+mercial damages such as loss of profits Of value. etc. 
+RINSE EMPTY CONT AINER THOROUGHLY 
+WITH WATER. 
+nn l\.Tn, R J:I 1,1: rn"T A. TNJ=:R nFSTROY WHEN