chore(ci): bootstrap CI + hooks

Squash-merge bootstrap-cicd into integration

instructions/bootstrap-cicd.md

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+Bootstrap CI/CD – Finalized Instructions (Phase 1)
+
+Goal
+- Provide Docker‑only local checks and Git hooks with parity to future CI. CI workflows are prepared but may remain disabled until runners are ready.
+
+Requirements
+- Docker + Docker Compose v2 on the development machine. No host packages beyond Docker are required.
+
+Local Checks
+- Entry point: `scripts/ci <phase>` where phase ∈ {format, lint, build, test, security, all}.
+- Always runs inside the ci container using `docker/ci.compose.yml`.
+- Tools pinned in `ci.Dockerfile`: shfmt, shellcheck, hadolint, yamllint, actionlint, prettier, markdownlint, commitlint.
+
+Hooks
+- Install hooks: `make hooks-setup` (copies .githooks/* into .git/hooks).
+- pre-commit: runs format + lint.
+- commit-msg: runs commitlint (Conventional Commits).
+- pre-push: runs build; test and security are present but currently no‑ops.
+
+Convenience Targets
+- `make quick` → format + lint.
+- `make check` → all phases.
+- `make build` → compose validation.
+
+CI (Prepared, optional enablement later)
+- .gitea/workflows/ci.yml: builds ci image; runs lint + build.
+- .gitea/workflows/release.yml: on pushes to main, creates annotated tag vYYYY.MM.DD-HHMM (UTC).
+- .gitea/workflows/nightly.yml: nightly lint run.
+- All jobs run inside the ci image; no runner host package installs.
+
+Protected Checks (when CI is enabled)
+- Protect: ci / lint, ci / build, ci / commitlint. Add ci / test and ci / security when they exist.
+
+Future Extensions
+- Add tests/security phases per repo stack; enable CI branch protections once runners are ready; optionally add pre-commit framework as an alternative to native hooks.
+

instructions/git-workflow.md

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+Git Workflow – Finalized Instructions
+
+Scope
+- Applies to this repo. Users typically consume tagged releases; contributors work via branches/PRs. CI/CD config is Gitea‑native; no GitHub/GitLab.
+
+Branches
+- main: production; default branch. Protected.
+- integration: development (unprotected; merges auto on green).
+- Working branches: `feature/<topic>`, `fix/<topic>`, `chore/<topic>` from integration.
+- Hotfix: `hotfix/<date>` from main; PR back to main, then forward-merge into integration.
+- Release branch: ephemeral or lightweight `release/*`. Protect when present; optionally fast‑forward to latest tag via CI.
+
+Merges & Approvals
+- Feature → integration: squash merge; auto‑merge on green (no human approval). Self‑merge allowed.
+- integration → main: squash merge; require 1 approval; self‑merge not allowed.
+- Force pushes disabled on protected branches (`main`, `release/*`); PRs required.
+
+Commit Style
+- Conventional Commits for PR titles and commit messages.
+
+Versioning & Tags
+- Calendar tags: vYYYY.MM.DD-HHMM (UTC). Annotated tags only on main after release.
+
+Release Flow
+1) Feature branches PR into integration; checks pass → auto‑merge.
+2) PR integration → main; 1 approval required; on merge, deploy and tag release.
+3) Optional: CI fast‑forwards a release branch pointer to the new tag.
+
+Protected Checks (to enable when runners are ready)
+- On protected branches (`main`, `release/*`): ci / lint, ci / build, ci / commitlint. Add ci / test and ci / security if/when introduced.
+
+CODEOWNERS
+- Keep minimal; require your review for integration → main.
+
+Notes
+- No secrets required for this repo. Future repos should integrate Vault for secrets.