refact(docs): compose-era sweeps retire with the last compose file

rank 7 tail. dankserver/compose.yaml (a parallel inventory whose mounts
had diverged from the quadlets) and its .env.example live in
dankserver/.AGENTTRASH/20261013-compose-retire/; the retired ik chat
template joined scripts/.AGENTTRASH/. No target has a compose file now:
- service-map drops the compose selection rule, compose file claim, and
  check_compose (the check list is schema/units/ownership/config/drift);
- deploy-remote's compose fallback is a loud failure, not a WARN-and-
  nothing for dankserver;
- compose_validity.bats goes to tests/.AGENTTRASH (it was sweeping only
  the trash file); env_consistency sheds its two compose sweeps;
- docs_completeness's compose sweep skips .AGENTTRASH so retired
  services cannot resurrect, and a revived compose stays covered;
- Testing Policy drops the Compose validity row.

tests/docs_completeness.bats

@@ -1,5 +1,7 @@
 #!/usr/bin/env bats
 # Seam: documentation completeness.
+# (compose era retired 2026-10-13; the sweep below now skips trash so a
+# revived compose file stays covered without resurrecting retired services)
 # Every service defined in a compose.yaml must have a matching documentation
 # page in serverAppConfigs-docs/ and must be reachable from the index. This is the "docs first"
 # contract of this repo: no service ships without documentation.
@@ -18,7 +20,7 @@ load helpers
                 return 1
             fi
         done < <(services_in "$f")
-    done < <(find "$REPO_ROOT" -name 'compose.yaml' -not -path '*/.git/*' | sort)
+    done < <(find "$REPO_ROOT" -name 'compose.yaml' -not -path '*/.git/*' -not -path '*/.AGENTTRASH/*' | sort)
 }
 
 @test "docs index links every docs page" {