chore: add CI/CD pipeline for Gitea deployment

- Add .gitea/workflows/build.yml for tag-triggered builds
- Add Dockerfile for containerized deployment (port 8086)
- Add .dockerignore to keep image lean
- Add CHANGELOG.md following Keep a Changelog format
- Update AGENTS.md with deployment verification URL

Build pipeline:
1. Create Gitea release on v* tag
2. Build and push Docker image to git.schweitz.internal
3. Trigger Watchtower for automatic deployment

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -0,0 +1,26 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.1.0] - 2026-01-09
+
+### Added
+- Initial FastAPI boilerplate setup
+- Domain-based project structure (src/domains/, src/shared/)
+- BaseController pattern with lazy router instantiation
+- Pydantic Settings configuration with env file support
+- Logger decorator with temporal benchmarking and trace IDs
+- UserProvider singleton for request-scoped context
+- Custom exception hierarchy
+- Health endpoints (/, /health)
+- Placeholder domains for agents (explore, plan, task)
+- Placeholder domains for tools (file, shell, search)
+- Placeholder domain for auth (tatlock integration)
+- CI/CD workflow for Gitea with Docker build and Watchtower deployment
+- Dockerfile for containerized deployment
+- CVE-checked dependencies (2026-01-09)