fix(apps): reconcile goldens to one canonical render + enforce render==golden gate

The committed apps/ goldens were a MIX of two render flag sets: 8 services
were rendered with `--no-image-automation` (no image CRs) while gitea and
nextcloud carried stale ImageRepository/ImagePolicy CRs from a render WITHOUT
the flag. Neither single command reproduced all goldens, and the gate did not
catch it.

Part A — canonical render:
  python3 catalog/render.py --all catalog -o apps --wave-layout --no-image-automation
`--no-image-automation` is canonical: image automation is authored-but-DISABLED
(DECISIONS-LOG; image-reflector/-automation controllers not installed), and
every app was onboarded via this flag. Re-render drops the ImageRepository +
ImagePolicy objects from gitea + nextcloud only (52 line deletions, purely the
trailing image-automation blocks). No functional content changed — the
nextcloud postStart hardening and gitea OIDC hook are untouched.

Part B — enforcement:
  ci/render-golden.sh renders every onboarded catalog service with the canonical
  command into a temp dir and FAILS on ANY diff vs committed apps/ (missing
  golden or content drift), across all 10 services (not just the 3 L1 spot-checks).
  Not-onboarded catalog entries (keycloak, vm-demo) are excluded per DESIGN-waves.
  Wired as a required no-cluster stage in ci/gate.sh, ci/Makefile, and both the
  live (.gitea/workflows/gate.yml) and dormant (merge-gate.yaml) pipelines.

Proof: tampering a golden makes the stage exit 1 (blocks merge); reverting
restores exit 0. `make -C ci gate` green in the devcontainer.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

ci/Makefile

@@ -11,7 +11,7 @@ CI_DIR := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 
 .DEFAULT_GOAL := help
 
-.PHONY: help spec-immutability lint schema l0 l1 conformance gate all touched versions tools
+.PHONY: help spec-immutability lint schema l0 render-golden l1 conformance gate all touched versions tools
 
 help: ## Show this help
 	@awk 'BEGIN{FS=":.*##"} /^[a-zA-Z0-9_-]+:.*##/{printf "  \033[36m%-14s\033[0m %s\n",$$1,$$2}' $(MAKEFILE_LIST)
@@ -25,6 +25,9 @@ lint: ## yaml/lint (no cluster; live now)
 schema l0: ## ServiceDefinition schema validation + Kyverno L0 policy gate (no cluster; live now)
 	@"$(CI_DIR)l0.sh"
 
+render-golden: ## render==golden: canonical render reproduces committed apps/ (no cluster; live now)
+	@"$(CI_DIR)render-golden.sh"
+
 l1: ## L1 rendering checks (no cluster; live now)
 	@"$(CI_DIR)l1.sh"