refactor: migrate CI/CD workflows from GitHub Actions to Gitea Actions and remove legacy workflows

CLAUDE.md

@@ -83,8 +83,8 @@ The cycle for every step is:
 | Reverse Proxy     | Nginx (serves frontend + proxies `/api` to backend)          |
 | Dev Mail          | Mailhog (SMTP trap + web UI)                                 |
 | All-in-one image  | Single Docker image: Nginx + Spring Boot + PostgreSQL + Supervisor |
-| Image registry    | Docker Hub (`<dockerhub-user>/condado-newsletter`)           |
-| CI/CD             | GitHub Actions — build, test, push to Docker Hub on merge to `main` |
+| Image registry    | Not configured (legacy Docker Hub publish workflow removed)   |
+| CI/CD             | Gitea Actions — run backend/frontend tests on pull requests to `develop` |
 
 ## Deployment Flavours
 
@@ -104,7 +104,7 @@ The all-in-one image (`Dockerfile.allinone`) bundles **everything** into a singl
 - **PostgreSQL** — embedded database
 - **Supervisor** — process manager that starts and supervises all three processes
 
-This image is published to Docker Hub at `<dockerhub-user>/condado-newsletter:latest`.
+The all-in-one image is built locally or in external pipelines as needed (no default registry publish workflow in-repo).
 
 **Minimal `docker run` command:**
 ```bash
@@ -121,7 +121,7 @@ docker run -d \
   -e IMAP_PORT=993 \
   -e APP_RECIPIENTS=friend1@example.com,friend2@example.com \
   -v condado-data:/var/lib/postgresql/data \
-  <dockerhub-user>/condado-newsletter:latest
+  <registry-or-local-image>/condado-newsletter:latest
 ```
 
 The app is then available at `http://localhost`.
@@ -218,8 +218,10 @@ condado-news-letter/               ← repo root
 │
 ├── .github/
 │   └── workflows/
-│       ├── ci.yml                 ← run tests on every PR
-│       └── publish.yml            ← build & push all-in-one image to Docker Hub on main merge
+│       └── (legacy, unused after Gitea migration)
+├── .gitea/
+│   └── workflows/
+│       └── ci.yml                 ← run tests on pull requests targeting `develop`
 │
 ├── backend/                       ← Spring Boot (Kotlin + Gradle)
 │   ├── build.gradle.kts
@@ -522,13 +524,17 @@ BODY:
 
 ## Git Workflow & CI/CD
 
-- Branch naming: `feature/<short-description>`, `fix/<short-description>`, `chore/<short-description>`
+- Git hosting: Gitea instance at `http://gitea.lab`.
+- Canonical remote: `origin = http://gitea.lab/sancho41/condado-newsletter.git`.
+- Branch model: **Git Flow** (`main` + `develop` as permanent branches).
+- Branch naming: `feature/<short-description>`, `fix/<short-description>`, `hotfix/<short-description>`, `release/<short-description>`, `chore/<short-description>`
 - Commit messages follow [Conventional Commits](https://www.conventionalcommits.org/): `feat:`, `fix:`, `chore:`, `docs:`, `test:`
 - Scope your commits: `feat(backend):`, `feat(frontend):`, `chore(docker):`
 - **TDD commit order per step:** first `test(<scope>): add failing tests for <step>`, then
   `feat(<scope>): implement <step> — all tests passing`.
-- PRs require all CI checks to pass before merging.
-- Never commit directly to `main`.
+- Pull requests must target `develop` for regular work.
+- CI runs on pull requests to `develop` and must pass before merge.
+- Never commit directly to `main` or `develop`.
 
 ### Commit Rules (enforced by AI)
 
@@ -564,23 +570,13 @@ Good examples:
 - `feat(frontend): implement step 2 - per-entity scheduled task creation`
 - `docs(config): clarify english-first language policy and commit quality rules`
 
-### GitHub Actions Workflows
+### Gitea Actions Workflows
 
 | Workflow file              | Trigger                    | What it does                                              |
 |----------------------------|----------------------------|-----------------------------------------------------------|
-| `.github/workflows/ci.yml` | Push / PR to any branch    | Backend tests (`./gradlew test`) + Frontend tests (`npm run test`) |
-| `.github/workflows/publish.yml` | Push to `main`        | Builds `Dockerfile.allinone`, tags as `latest` + git SHA, pushes to Docker Hub |
+| `.gitea/workflows/ci.yml`  | PR to `develop`            | Backend tests (`./gradlew test`) + Frontend tests (`npm run test`) |
 
-**Required GitHub Secrets:**
-
-| Secret                | Description                                |
-|-----------------------|--------------------------------------------|
-| `DOCKERHUB_USERNAME`  | Docker Hub account username                |
-| `DOCKERHUB_TOKEN`     | Docker Hub access token (not password)     |
-
-**Image tags pushed on every `main` merge:**
-- `<dockerhub-user>/condado-newsletter:latest`
-- `<dockerhub-user>/condado-newsletter:<git-sha>` (for pinning)
+Current policy: old publish/version automation workflows were removed during the Gitea migration.
 
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