ci: bootstrap FR-flow callers on main

.github/workflows/fr-gate-caller.yml

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+name: FR gate
+
+# Per-repo caller. Blocks merges to staging/main/master unless every contained
+# kanban item is in "Ready for staging" or "Ready for prod" respectively.
+# All logic lives in tracebloc/.github/.github/workflows/fr-gate.yml.
+
+on:
+  pull_request:
+    branches: [staging, main, master]
+    types: [opened, reopened, synchronize, ready_for_review, labeled, unlabeled]
+
+jobs:
+  gate:
+    uses: tracebloc/.github/.github/workflows/fr-gate.yml@main
+    secrets: inherit

.github/workflows/fr-pass-comment-caller.yml

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+name: FR pass comment
+
+# Per-repo caller. Listens for /fr-pass comments and advances kanban items
+# from "FR on dev" → "Ready for staging" or "FR on staging" → "Ready for prod".
+# All logic lives in tracebloc/.github/.github/workflows/fr-pass-comment.yml.
+
+on:
+  issue_comment:
+    types: [created]
+
+jobs:
+  advance:
+    uses: tracebloc/.github/.github/workflows/fr-pass-comment.yml@main
+    secrets: inherit