feat(01-foundation-01): monorepo scaffolding, Docker Compose, and shared data models

- pyproject.toml: uv workspace with 5 member packages (shared, gateway, router, orchestrator, llm-pool)
- docker-compose.yml: PostgreSQL 16 + Redis 7 + Ollama services on konstruct-net
- .env.example: all required env vars documented, konstruct_app role (not superuser)
- scripts/init-db.sh: creates konstruct_app role at DB init time
- packages/shared/shared/config.py: Pydantic Settings loading all env vars
- packages/shared/shared/models/message.py: KonstructMessage, ChannelType, SenderInfo, MessageContent
- packages/shared/shared/models/tenant.py: Tenant, Agent, ChannelConnection SQLAlchemy 2.0 models
- packages/shared/shared/models/auth.py: PortalUser model for admin portal auth
- packages/shared/shared/db.py: async SQLAlchemy engine, session factory, get_session dependency
- packages/shared/shared/rls.py: current_tenant_id ContextVar and configure_rls_hook with parameterized SET LOCAL
- packages/shared/shared/redis_keys.py: tenant-namespaced key constructors (rate_limit, idempotency, session, engaged_thread)

pyproject.toml

@@ -0,0 +1,59 @@
+[project]
+name = "konstruct"
+version = "0.1.0"
+description = "AI workforce platform — channel-native AI employees for Slack, Teams, and more"
+requires-python = ">=3.12"
+dependencies = []
+
+[tool.uv.workspace]
+members = [
+    "packages/shared",
+    "packages/gateway",
+    "packages/router",
+    "packages/orchestrator",
+    "packages/llm-pool",
+]
+
+[dependency-groups]
+dev = [
+    "ruff>=0.11.0",
+    "mypy>=1.15.0",
+    "pytest>=8.3.0",
+    "pytest-asyncio>=0.25.0",
+    "pytest-httpx>=0.35.0",
+    "httpx>=0.28.0",
+    "fakeredis>=2.28.0",
+]
+
+[tool.pytest.ini_options]
+asyncio_mode = "auto"
+testpaths = ["tests"]
+python_files = ["test_*.py"]
+python_classes = ["Test*"]
+python_functions = ["test_*"]
+
+[tool.ruff]
+line-length = 120
+target-version = "py312"
+
+[tool.ruff.lint]
+select = [
+    "E",   # pycodestyle errors
+    "W",   # pycodestyle warnings
+    "F",   # pyflakes
+    "I",   # isort
+    "B",   # flake8-bugbear
+    "C4",  # flake8-comprehensions
+    "UP",  # pyupgrade
+]
+ignore = [
+    "E501",  # line too long (ruff format handles this)
+]
+
+[tool.ruff.lint.isort]
+known-first-party = ["shared", "gateway", "router", "orchestrator", "llm_pool"]
+
+[tool.mypy]
+python_version = "3.12"
+strict = true
+ignore_missing_imports = true