feat(harness): P2 — delete legacy customization keys & paths (rcust)

a) compose.ccci.yml is FIRST-CLASS: the harness auto-copies tests/<recipe>/
   compose.ccci.yml into the run's recipe checkout (ABRA_DIR-aware, lifecycle.
   provide_ccci_overlay) and auto-chaoses the pinned base deploy on its presence
   (kills the R7 implicit coupling). ghost/discourse install_steps.sh (copy-only
   boilerplate) deleted; CHAOS_BASE_DEPLOY removed from both metas + the registry.

b) install-time deps wiring is the ONLY mode: deps with DEPS provision BEFORE the
   single deploy; legacy post-deploy provisioning + the setup_custom_tests.sh
   invocation machinery deleted. lasuite-docs migrated to install_steps.sh OIDC
   wiring (same env names/values as the old hook — only the timing moved);
   lasuite-drive's remaining post-deploy MinIO bucket one-shot moved to ops.py
   pre_install; both setup_custom_tests.sh files deleted; OIDC_AT_INSTALL removed
   from drive/meet metas + the registry.

c) SKIP_GENERIC meta key deleted (zero users). Env form CCCI_SKIP_GENERIC* stays
   as the documented dev-only escape hatch; when active in a drone CI run the
   orchestrator prints a loud !! warning (manifest embedding lands in P5).

d) conftest cleanup: dead pre-deploy-once fixtures deployed/deployed_app deleted
   (zero users), app_domain + _short + _wait_healthy dropped (only users were the
   deleted fixtures); deps_apps+deps_creds consolidated into ONE deps fixture
   (entries expose .domain etc. as attributes; dict access intact); the 6 lasuite
   test files renamed deps_creds->deps (fixture name only — assertions and flows
   byte-identical). requires_deps marker + F2-11 skip-report plumbing unchanged.

Registry is now exactly the 14 final keys; docs §4 table regenerated. Stale
setup_custom_tests/OIDC_AT_INSTALL prose in docstrings/comments/assert MESSAGES
updated (no assert logic or expected value touched).

Verified on cc-ci: cc-ci-run -m pytest tests/unit -q -> 175 passed; scripts/lint.sh -> PASS.

docs/recipe-customization.md

@@ -123,9 +123,6 @@ _This table is GENERATED from the `runner/harness/meta.py` KEYS registry by `scr
 | `DEPS` | `list[str]` | `[]` | Dep recipes deployed/provisioned alongside (e.g. `["keycloak"]`); creds land in `$CCCI_DEPS_FILE`. |
 | `WARM_CANONICAL` | `bool` | `False` | Enroll the recipe in the warm/canonical app system (docs/warm.md): green cold runs on LATEST advance the canonical snapshot. |
 | `SCREENSHOT` | `hook` | `None` | Callable driving Playwright to a safe, credential-free post-login view for the results-card screenshot (default: landing page). |
-| `CHAOS_BASE_DEPLOY` **(deprecated)** | `bool` | `False` | DEPRECATED (P2 deletes): ship `tests/<recipe>/compose.ccci.yml` instead — the harness auto-copies it and auto-uses `--chaos` for the base deploy. |
-| `OIDC_AT_INSTALL` **(deprecated)** | `bool` | `False` | DEPRECATED (P2 deletes): install-time deps provisioning becomes the ONLY mode when `DEPS` is set. |
-| `SKIP_GENERIC` **(deprecated)** | `list[str]` | `[]` | DEPRECATED (P2 deletes; zero users): suppress the generic floor for the listed ops. The env form `CCCI_SKIP_GENERIC*` stays as a dev-only escape hatch. |
 
 <!-- META-TABLE-END -->