test(acceptance): reproducible Stage 8 acceptance package

Add test/acceptance/ so the customer's reviewers can re-run what the
Stage 8 documents claim on an isolated stand built from this branch:

- compose.acceptance.yml + stand.sh: compose project gis-acceptance
  (app 18080, postgres 15432, minio 19000/19001, rabbitmq mgmt 15672),
  POSTGIS_PLATFORM / MINIO_IMAGE knobs for arm64 and amd64 hosts.
- functional.sh: the 89 test-stand checks of Приложение 7 section 5
  (F01-F38, N01-N38, L02-L05, L07-L15), own prefixed test data,
  PostGIS/MinIO confirmation via the stand containers, full cleanup.
- lp_gen.py / lp_run.sh / lp_verify.py: synthetic ЛП inputs, a run from
  stage 0, and an independent numpy re-implementation of every node that
  compares all 15 outputs pixel by pixel; read-only (GET) mode works
  against any stand, in row/column windows for 22219x14977 rasters.
- load.sh + seed.sh: scenarios S1-S6 of Приложение 3 with hey 0.1.5
  running inside the stand network; CSV/JSON summaries, criteria K1-K4.
- scan.sh: govulncheck (source and binary), gosec, trivy fs/image,
  golangci-lint; fails on any High/Critical.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test/acceptance/data/style.sld

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<sld:StyledLayerDescriptor version="1.0.0" xmlns:sld="http://www.opengis.net/sld" xmlns:ogc="http://www.opengis.net/ogc">
+  <sld:NamedLayer>
+    <sld:Name>ndvi</sld:Name>
+    <sld:UserStyle>
+      <sld:Title>NDVI gradient</sld:Title>
+      <sld:FeatureTypeStyle>
+        <sld:Rule>
+          <sld:RasterSymbolizer>
+            <sld:ColorMap>
+            <sld:ColorMapEntry color="#a50026" quantity="0.0"/>
+            <sld:ColorMapEntry color="#ffffbf" quantity="0.5"/>
+            <sld:ColorMapEntry color="#006837" quantity="1.0"/>
+            </sld:ColorMap>
+          </sld:RasterSymbolizer>
+        </sld:Rule>
+      </sld:FeatureTypeStyle>
+    </sld:UserStyle>
+  </sld:NamedLayer>
+</sld:StyledLayerDescriptor>