chore: add missing repo policy files (auto-enforced)

Applied 2 policy files via audit-repo-policies.sh.
Repo type: shell
Files: Dockerfile REPO_POLICIES.md branch-protection

Dockerfile

@@ -0,0 +1,6 @@
+# alpine:3.21 (pinned 2026-01-28)
+FROM alpine:3.21@sha256:22e0ec13c0db6b3e1ba3280e831fc50ba7bffe58e81f31670a64b1afede247bc
+RUN apk add --no-cache bash shellcheck
+COPY . /app
+WORKDIR /app
+RUN make check

REPO_POLICIES.md

@@ -0,0 +1,27 @@
+# Repository Policies
+
+This repository follows the sol/* organization standard policies.
+
+## Required Files
+- Makefile with targets: test, lint, fmt, fmt-check, check, docker, hooks, release
+- .editorconfig
+- Dockerfile (CI: docker build . runs make check)
+- REPO_POLICIES.md (this file)
+- tools/secret-scan.sh
+
+## Branching
+- All work on feature branches (feat/*, fix/*, chore/*)
+- No direct pushes to main (enforced by Gitea branch protection)
+- PRs required for merging to main
+
+## Commits
+- Conventional commit format: feat:, fix:, chore:, docs:
+- Breaking changes: feat!: or BREAKING CHANGE: in body
+
+## Releases
+- SemVer tagging via `make release BUMP=patch|minor|major`
+- Gitea releases with release notes for each version
+
+## CI
+- `docker build .` runs `make check` as part of the build
+- All checks must pass before merge