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/9779-290.md

@@ -0,0 +1,325 @@
+# VALCO BRAND VAL DROP NO. 3 DEFOLIANT
+
+- EPA Reg No: **9779-290**
+- Registrant: WINFIELD SOLUTIONS, LLC
+- Signal word: Danger
+- Active ingredients: Sodium chlorate (29.5%)
+- Label accepted: 1980-06-20
+- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/001063-00118-19800620.pdf
+
+---
+I'Ht ('A.'111'lN'fi'l' ~TA.!!"frr,.TN;o.; 
+rJI\N(~t.H 
+HA.IA.kl,OUS 1') HUMANS A.NI'· :)()Ml STI" 
+ANIMALS 
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+ENVIRONMENTAL HAZAIIDS 
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+'----------,----
+DANGER 
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+,'the-r pl..!.' f.!r"",,~~: It .• , 1!"j(~.t tot' dd"j.,jt~1 C;,· .• : 
+011101 ~.,j~l: -'lJ1,,), t'4u1pn,t'nt bc-fur~ .nd ~fter 4..~e 
+.lInd do n"l 411110,'4' wash v. .. tf'r to rohtact drsJr­
+.hlf' plant.-. To it\"ld flrf' ',r ~.pln'lon do 1I',t mix 
+'Io:!L U\\t·(tlt',,~I·' 
+STORAQa" DIiPOSAL 
+PROHIBITIONS, 
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+hd,.tl·,j I 
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+~" I'" . I, 
+CONTAINER DISPOSAL: Tr. dille (,.r 1''1'''''';' .. : 
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+GENERAL.: L'.,n::. .. lt ....... St"t{' ....... t:, .1 
+,.' ,:tt·!T ... t,· p:-',n:d~ 
+~:-I(':t~~-:~~~S::~~~t.ru~I~~·;~·': 
+APPLICATION, .; 'd_ !>RCP· ...... _;" J C, 
+("QU:P!1"'lll TI~,,! .~,,~. U\I:'~""''' ('r",," pld~', 
+:t"nl.fto:dt ... ~j"' r"iU r. ~~(.rt' lln,(" f,,~ \·AI.-DRIJP.:: 
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+GENERAL INFORMATION 
+COTTON DEFOLIANT 
+1.' 
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+VAL -DROP No 
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+A COlNC[:NTI 
+or 
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+I STATEMENT or p".r"1! 
+i IN 
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+I .,,:' !,:,' 1, 
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+NOTE TO PHYSICIAN: r' ,,' 
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+SEF. LEf'T PANEL rOR A.DDITION Al PRf:C A. VTlON A R Y 
+STATEMENTS 
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+VALLEY CHEMICAL COMPAIY 
+;R&ENVILLK P 0 -all 1111 Jlrl(3StSSIP~j . 
+» 
+SUGGEST 
+COTTON DEf'OL.IAN 
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+i"a,t 30 days 01,1 D() 
+t,.,.foff' harV(':.t 
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+GIIAIN SOllGHUM } 
+T,> rt'd~j('t· the ffiql"ttu 
+{fup b ",tandln,. use i 
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+~rage, may be apph 
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+~..t;, 'n ral~ \\0 hen 
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+, Appi \ -:- d .• y<; tx-f'jr. Do n .... 
+. :,.!' ~ !'.'lgl' ,,: rf'sld..a ?,lthia.JI 4 
+SOYBEAN HAllVESY 
+';10\;. ~:L~ d.:~.1 f~'·lhtat. 
+'·!;ow/.: I "" "'1'1 ~l' gn'(' 
+dPP!;ldL ,r, -;' :,' l'J dOll)'S 
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+hJ!l~ ,,f ! ',,: "";utl";] p£"r a('r~ D" nnt 
+11"""'<1 I .. ,t', f lagf' ar.'i foddf'r 
+SUNFLOWERS, CONFECTIOIIARY ANI 
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+NOTICr. TO USERS: ,'">t'.,· ' .... alOin! 
+.• fll:' <t ,j",",( rlptlur: and 1:- tt'<liCoOlla: 
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+----- -- -------
+---------------------------------------------------------
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+I ~k.Hl A\tJH: ,I, 
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+IAZAIIDS 
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+NOT£. TO PHYS:CIAH. 
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+p '") BOX :3:"7 
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