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/829-172.md

@@ -0,0 +1,109 @@
+# SA-50 BRAND 2,4-D LAWN & TURF WEED KILLER
+
+- EPA Reg No: **829-172**
+- Registrant: SOUTHERN AGRICULTURAL INSECTICIDES, INC.
+- Signal word: Caution
+- Active ingredients: 2,4-dichlorophenoxyacetic acid, N-oleyl-1,3-propylenediamine salt (57%)
+- Label accepted: 1972-06-15
+- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/000829-00172-19720615.pdf
+
+---
+WARNING! Do not apply SA·SO Lawn and Turf 
+Weed Killer directly to, or otherwise pt'rmit it to 
+come into contact with vegetables, flowers, 
+grapes, fruit trees, ornamentals, cotton, other de­
+sirable plants which are sensitive to 2,4-0 and 
+similar materials, and do not permit spray mist 
+containing 2,4-0 to drift onto them, since ~ven 
+minute quantities of the spray may cause severe 
+. injury during both growing and dormant periods. 
+Coarse sprays are less likely to drift. Do not con­
+taminate irrigation ditches or water used for do­
+. -.,mestic purposes. Do not store near fertilizers, 
+. seeds. insectlcldes, or funclcldes. Excessive 
+amounts of 2.4-0 Acid in the soil may tt'mporar­
+lIy Inhibit seed germination or plant growth. To 
+avoid injury to desirable plants do not store, 
+handle or apply other agricultural chemicals 
+with the same containe-. or equipment used for 
+2,4-0. 
+Local conditions may affect the use of herbi­
+cides. Consult state agricultural experiment sta­
+tion or extension weed specialist for recommen­
+dations for use in your area consistant with 
+this label. 
+SA·SO Lawn and Turf Weed Killer contains 
+lJacamine and is formulated to give the combin­
+ed low volatility of the amine form of 2,4-0 
+and effectiveness of the ester form of 2,4-0. When 
+mixing sprays add half the water to the tank, 
+add the indicated amount of SA-50 Lawn and 
+'rurf Weed Killer, then add the balance of water 
+with continued thorough agitation. APply as a 
+eoarse, low pressure spray during warm weather 
+When weeds are young and actively growing. Ap­
+ply when air is still. 
+LA WN AND TURF GRASSES-For use on t I 
+Bermuda, ,arion Blue, Kentucky Blut'. 
+o ,es'1!e. an Zoysia. 1J0 dol use on St. u­
+ti e.entipede. BEfit or otht'r creeping grass­
+ts. putting greens, or legumt's such as clover. 
+Do not use on newly planted or seedt'd turf until 
+crass has become well established. Apply 1 quart 
+per acre (liz tablespoonfuls in 2 gallons of watt'r 
+-_._-_. --
+c . 
+• 
+r 
+D II 
+ACTIVE INGREDIENTS: 
+N -Oleyl 1,3-propylene diamine salt of 2,4-dlchloro-
+phenoxyacetlc acid ......... ....... _ .... _ .......................... 57.0'; 
+(equivalent to 2,4-dichlorophenoxyacetic acid 42.3';,) 
+INERT INGREDIENTS .. ... .. .... . ........ 43.0;; 
+Licensed under U. S. Pat. No. 2,900.411 
+REACH 
+. makes 
+or implied, as to the use of this ma Buyer as­
+sumes all risks and liability for results obtained by use 
+or handling of this material whether or not in accord­
+ance with the directions or cl~ so to be. 
+Southern Agricultural Insecticides, Inc. 
+Hendersonville, N. C. Boone, N. C. Palmetto, Fla. 
+l'.S.n.A. R('g. No. 829-17~ Net Liquid contents: 32 oz. 
+per 1000 sq. ft.) in sufficient water to provide 
+uniform coverage. For control of wild larlic and 
+wild onion. apply 2 to 3 quarts per aere (4 table­
+SPOOhidiii in 2 gallons of water per 1000 sq. ft.) 
+in very early sprinr: each year for at least 3 years. 
+Do not apply imm«'diately preceeding heavy rains. 
+Do not sprinkle for at least a day after applica­
+tion. Do not apply to lawn or turf grasses under 
+stress from drought, excessive water or close 
+mowing. 
+COR~-PRE-EMJ~RGENCE ~~EATMENT. Apply 
+edity 0 soil surface 3 to 5 days after plantinc •. 
+but before corn emerges. Use higher rate on 
+heavy soils. Do not use on lll;;ht. sandy soils. Mix 
+I/Z to % cupful in 3 gallons of water to cover 
+1/10 acre. 
+CORN-POST·EMERGENCE TREATMENT. Ap­
+ply evenly to soil surface and emerged weed seed­
+lings when com is 10 to 12 inches tall. Direct 
+spray to avoid getting spray into whorl or on 
+corn leaves. Mix 3 to 4 tablespoonfuls in 3 gal­
+lons of water to fover 1/10 acre. Do not cultivate 
+for at least 10 days after spraying. Application to 
+wet soils during hot weather may cause injury 
+to corn. 
+GENERAL WEED CONTROL-In vacant lots, 
+on roadSides, and al('lng fence rows, use j tiDle­
+spoonfuls per gallon of water. Spray to thorough. 
+Iy wet follage. D(!ep rooted perenials may require 
+repeated applications as new growth appears. 
+WEEDS CONTltOLED: This material is recom­
+mended for the c'ontrol of the following, in addi­
+tion to many other broad·leafed weeds, without 
+injury to most grasses: 
+wa-.~ 
+•