docs: add releasing section to CLAUDE.md

Document the Gitea Actions release pipeline and how to trigger it
via API with patch/minor/major bump types.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -62,6 +62,20 @@ bun run build               # Vite build → dist/client/
 - `tests/helpers/db.ts`: `createTestDb()` creates in-memory SQLite via Drizzle migrations and seeds an "Uncategorized" category.
 - **E2E**: Playwright (`bun run test:e2e`). Tests in `e2e/` run against a seeded SQLite database with the server in production mode. Seed script: `e2e/seed.ts`.
 
+## Releasing
+
+Releases are managed by a Gitea Actions workflow (`.gitea/workflows/release.yml`). **Never create tags or releases manually** — always trigger the pipeline.
+
+The workflow runs CI (lint, test, build), computes the next version from the latest tag, generates a changelog, creates the tag, builds and pushes a Docker image, and creates a Gitea release.
+
+Trigger via Gitea API:
+```bash
+curl -s -X POST "https://gitea.jeanlucmakiola.de/api/v1/repos/makiolaj/GearBox/actions/workflows/release.yml/dispatches" \
+  -H "Authorization: token <GITEA_TOKEN>" \
+  -H "Content-Type: application/json" \
+  -d '{"ref": "Develop", "inputs": {"bump": "patch"}}'  # patch | minor | major
+```
+
 ## Branching
 
 - **Develop** is the main branch. Keep it clean — don't commit large feature work directly.