ci: canonical pair — hanzo.yml + forge caller

github.com has no runner for hanzo-build-linux-amd64, so a caller under
.github/workflows is a gate that can never be scheduled. This is the ~7-line
caller on the plane that can (git.hanzo.ai git-runner fleet), pinned @v1.

Co-authored-by: Hanzo Dev <[email protected]>

.hanzo/workflows/cicd.yml

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+# Canonical caller — every knob lives in /hanzo.yml, none here.
+# Runs on the git-runner fleet at git.hanzo.ai, the only pool serving these
+# labels. github.com resolves only .github/workflows and has no runner for
+# them, so a caller placed there is a gate that cannot be scheduled.
+name: CI/CD
+on:
+  push:
+    branches: [main]
+    tags: ['v*']
+  pull_request:
+  workflow_dispatch:
+jobs:
+  cicd:
+    uses: hanzoai/ci/.hanzo/workflows/build.yml@v1
+    secrets: inherit

hanzo.yml

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+# Canonical CI/CD config for hanzoai/mail — read by hanzoai/ci (via
+# .hanzo/workflows/cicd.yml) and by platform.hanzo.ai.
+#
+# Go server (mox fork). Dependencies are vendored, so the build needs no network
+# and the gate is the compile plus vet over every package — the same two commands
+# the repo's own Makefile runs first, for the same reason: they catch the break
+# before anything slower does.
+#
+# No `images:` and no `deploy:` — nothing in universe runs this yet. A build
+# target for a service nobody deploys would be a tag that means nothing; when a
+# Service CR exists, the image block goes here and not before.
+test:
+  - name: build
+    run: CGO_ENABLED=0 go build ./... && CGO_ENABLED=0 go vet ./...