ci(gitea): workflow — yamllint + secret scan on dev/release [#784]

Fleet CI standard; runner #784. Runs go green once the act_runner
registers (token pending founder).
https://projects.knownelement.com/issues/784

.gitea/workflows/ci.yml

@@ -0,0 +1,24 @@
+# pfv-bms CI [#784 #778] — fleet standard per Discourse "CI/CD: Gitea Actions".
+# Runs on dev (pre-release gate) and release (final gate before live pull).
+name: ci
+on:
+  push:
+    branches: [dev, release]
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    container:
+      image: node:20-bookworm
+    steps:
+      - uses: actions/checkout@v4
+      - name: yamllint
+        run: |
+          pip install --quiet yamllint
+          yamllint -c .yamllint .
+      - name: secret scan
+        run: |
+          if grep -rInE "BEGIN (RSA |OPENSSH |EC |DSA )?PRIVATE KEY|aws_secret_access_key *=|AKIA[0-9A-Z]{16}" --exclude-dir=.git .; then
+            echo "::error::secret material committed"; exit 1
+          else
+            echo "secret scan clean"
+          fi

.yamllint

@@ -0,0 +1,19 @@
+# HA-config-aware yamllint [#784]: keep the checks that catch real bugs
+# (duplicates, structure), relax the stylistic ones HA templates trip.
+extends: default
+ignore: |
+  docs/
+rules:
+  line-length: disable
+  comments: disable
+  comments-indentation: disable
+  document-start: disable
+  truthy: check-keys: false
+  indentation:
+    spaces: consistent
+    indent-sequences: consistent
+  key-duplicates: enable
+  new-line-at-end-of-file: disable
+  trailing-spaces: disable
+  empty-lines:
+    max-end: 2