test: throwaway workflow_call + secrets:inherit feasibility probe (Phase 4)

.gitea/workflows/zz-wf-call-probe-caller.yml

@@ -0,0 +1,9 @@
+# THROWAWAY feasibility probe for Phase 4 — delete after.
+name: zz-wf-call-probe-caller
+on:
+  push:
+    branches: [test/wf-call-probe]
+jobs:
+  call-reusable:
+    uses: ./.gitea/workflows/zz-wf-call-probe-reusable.yml
+    secrets: inherit

.gitea/workflows/zz-wf-call-probe-reusable.yml

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+# THROWAWAY feasibility probe for Phase 4 — delete after.
+name: zz-wf-call-probe-reusable
+on:
+  workflow_call: {}
+jobs:
+  probe:
+    runs-on: ubuntu-latest
+    steps:
+      - name: report inherited-secret visibility (no leak)
+        env:
+          S: ${{ secrets.OLLAMA_CLOUD_API_KEY }}
+        run: |
+          if [ -n "$S" ]; then echo "WFCALL_PROBE_RESULT=SECRET_PRESENT"; else echo "WFCALL_PROBE_RESULT=SECRET_ABSENT"; fi