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.

serverAppConfigs-docs/Architecture/Testing Policy.md

@@ -15,10 +15,9 @@ This repository tests its configuration at defined seams. The tests run with `ba
 
 | Seam | File | What it asserts |
 |------|------|-----------------|
-| Compose validity | `tests/compose_validity.bats` | YAML parses, services have images, no named volumes |
 | Env consistency | `tests/env_consistency.bats` | every `${VAR}` is defined in `.env.example`; no real secrets; the live gitea password never appears |
 | Caddyfile validity | `tests/caddyfile.bats` | per-host Caddyfile, `.local` convention, balanced braces, basic auth present |
-| Docs completeness | `tests/docs_completeness.bats` | every compose service has a docs page; index links every page |
+| Docs completeness | `tests/docs_completeness.bats` | every service has a docs page; index links every page; no unresolved vault links |
 | Script syntax | `tests/scripts_syntax.bats` | `bash -n` clean, executable bits, shellcheck when available |
 | Deployment flow | `tests/deployment_flow.bats`, `tests/deployment_scoping.bats` | scoped dispatcher exists, targets are known, service plans isolate inference, Caddy ownership is guarded, and SSH reachability is checked (skips offline) |
 | Quadlet units | `tests/*quadlet*.bats` | every unit is boot-persistent, self-healing, repo-provenanced, secret-free |