R-428: the gate that hunts label-matching was matching a label (and CI proved it)

decoy_coverage_gate.py identified a repository by os.path.basename(root), looked up in a RUNNERS
map. Gitea's act-runner checks the repo out into a directory called `hostexecutor`, so on its FIRST
CI run the gate reported "unknown repo 'hostexecutor'" and went INCONCLUSIVE - correctly refusing to
pass, and blind.

A NAME standing in for a FACT, in the first ten lines of the main loop of the gate written that same
morning to catch exactly that, by a session with the four shapes on screen. That is the point of
R-428 and why it is recorded rather than quietly patched: this class is not carelessness.

FIXED: the repo is now identified by which registered runner FILE exists under the root. Verified
under a renamed directory - 14 gates found where the name-based version found none.

CI also now fetches app-catalog-felhom.eu. The meta-gate walks all four runners, and a gate that
cannot see part of its subject must not report a pass on it - the same reasoning, and the same fix,
as the two sibling fetches already in the workflow.

NOTE ON THE OTHER THREE RED RUNS, all mine and all ordering: felhom-agent and felhom-controller cite
R-421, and I pushed them BEFORE felhom.eu carried that row, so instructions_gate correctly convicted
"cites R-421, which appears in neither register". The register lives in felhom.eu; any repo citing a
new row must be pushed after it. Re-run below.

.gitea/workflows/gates.yml

@@ -92,6 +92,19 @@ jobs:
           git checkout -q FETCH_HEAD
           echo "controller CHANGELOG at $(git rev-parse --short=12 HEAD): $(head -1 CHANGELOG.md)"
 
+      - name: Fetch the app catalog (decoy-coverage reads all four runners)
+        # R-421's meta-gate walks every registered gate across all four repos, so it needs all four
+        # present. Without this it reports the catalog's runner as missing — and a gate that cannot
+        # see part of its subject must not report a pass on it. Same reasoning, and the same fix, as
+        # the two sibling fetches above: give the gate what it needs rather than let it skip.
+        run: |
+          git init -q ../app-catalog-felhom.eu
+          cd ../app-catalog-felhom.eu
+          git remote add origin http://gitea.gitea-system.svc.cluster.local:3000/admin/app-catalog-felhom.eu.git
+          git fetch -q --depth 1 origin main
+          git checkout -q FETCH_HEAD
+          echo "catalog at $(git rev-parse --short=12 HEAD)"
+
       - name: Classify the push - code or documents (R-404)
         # ONE RULE, NOT TWO. The pre-push hook exempts a golden-currency CONVICTION on a
         # documents-only push; if CI did not do the same, a drill night would still produce red CI