feat: WP-0001 + WP-0002 complete — LEVEL1 core + service interfaces

WP-0001 (Foundation & LEVEL1 Core):
- manifest model (FR-100), MD→DOCX builder (FR-200), DOCX→MD importer
  (FR-300/400), template family registry (FR-600), drift detector (FR-700),
  CLI wiring, pre-commit config, CI skeleton, regression harness

WP-0002 (Service Interfaces & Workflow Orchestration):
- REST service via FastAPI (FR-900): /health, /version, /capabilities,
  /templates, /styles, /validate, /build, /import, /compare,
  /templates/register, /workflows/{name}, /evidence/{run_id}
- Evidence & report store (FR-1400): JSON-backed, per-run, retrievable
  through all interfaces, classification (pass/warnings/failed)
- Composite workflow orchestration (FR-1300): single-file-roundtrip,
  multi-file-roundtrip, release-regression, family-switch-build
- MCP server via FastMCP (FR-1000): all tools + resources
- CLI additions: `markidocx serve`, `markidocx workflow`, `markidocx mcp`
- Interface parity tests: CLI / REST / MCP produce equivalent results

135 tests passing, ruff + mypy clean.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/ci.yml

@@ -0,0 +1,34 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.11", "3.12"]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install dependencies
+        run: pip install -e ".[dev]"
+
+      - name: Lint (ruff)
+        run: ruff check .
+
+      - name: Type check (mypy)
+        run: mypy src/
+
+      - name: Run tests
+        run: pytest