feat: implement GraphQL member management API

Implement complete member management system with GraphQL API per OpenSpec proposal.
Only firstName is required; all other fields are optional with conditional validation.

Key features:
- GraphQL CRUD operations (create, read, update, delete members)
- SQLAlchemy 2.0 async with SQLite database
- Alembic database migrations
- Conditional validation (email/phone validated only when provided)
- Member fields: firstName (required), lastName, address, email, phone (all optional)
- Database seed script with sample member
- FastAPI with Strawberry GraphQL integration

Implementation details:
- Python 3.11+ with uv package manager
- Async database sessions throughout
- Proper error handling and validation
- Code quality: black, isort, ruff
- Comprehensive end-to-end testing completed

All 20 tasks from OpenSpec proposal completed successfully.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

pyproject.toml

@@ -0,0 +1,45 @@
+[project]
+name = "clubber"
+version = "0.1.0"
+description = "Member management system for non-profit societies with GraphQL API"
+requires-python = ">=3.11"
+authors = [
+    { name = "Clubber Team" }
+]
+license = { text = "MIT" }
+dependencies = [
+    "aiosqlite>=0.21.0",
+    "alembic>=1.17.2",
+    "fastapi>=0.121.3",
+    "pydantic-settings>=2.12.0",
+    "sqlalchemy[asyncio]>=2.0.44",
+    "strawberry-graphql[fastapi]>=0.286.0",
+    "uvicorn[standard]>=0.38.0",
+]
+
+[dependency-groups]
+dev = [
+    "black>=25.11.0",
+    "isort>=7.0.0",
+    "pytest>=9.0.1",
+    "pytest-asyncio>=1.3.0",
+    "ruff>=0.14.5",
+]
+
+[tool.black]
+line-length = 88
+target-version = ["py311"]
+
+[tool.ruff]
+line-length = 88
+
+[tool.ruff.lint]
+select = ["E", "F", "W", "I"]
+ignore = ["E501"]
+
+[tool.isort]
+profile = "black"
+multi_line_output = 3
+
+[tool.pytest.ini_options]
+asyncio_mode = "auto"