Initial project structure

Scaffold all modules, route stubs, data models, and config.
No logic implemented yet — all core methods raise NotImplementedError.
Establishes the full directory layout matching the architecture in CLAUDE.md.

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

fellowship/logger.py

@@ -0,0 +1,35 @@
+"""
+Logging setup for Fellowship.
+Call setup_logging() once at startup. All modules use standard logging.getLogger(__name__).
+Logs are written to logs/{YYYY-MM-DD}.log and to stdout in debug mode.
+"""
+
+import logging
+import logging.handlers
+import os
+from datetime import date
+
+
+def setup_logging() -> None:
+    os.makedirs("logs", exist_ok=True)
+
+    log_file = f"logs/{date.today().isoformat()}.log"
+    formatter = logging.Formatter(
+        fmt="%(asctime)s [%(levelname)s] %(name)s — %(message)s",
+        datefmt="%Y-%m-%dT%H:%M:%S",
+    )
+
+    file_handler = logging.handlers.TimedRotatingFileHandler(
+        log_file, when="midnight", backupCount=30, encoding="utf-8"
+    )
+    file_handler.setFormatter(formatter)
+    file_handler.setLevel(logging.DEBUG)
+
+    console_handler = logging.StreamHandler()
+    console_handler.setFormatter(formatter)
+    console_handler.setLevel(logging.DEBUG)
+
+    root = logging.getLogger()
+    root.setLevel(logging.DEBUG)
+    root.addHandler(file_handler)
+    root.addHandler(console_handler)