Refactor into modular structure with improvements

- Split monolithic intercept.py (15k lines) into modular structure:
  - routes/ - Flask blueprints for each feature
  - templates/ - Jinja2 HTML templates
  - data/ - OUI database, satellite TLEs, detection patterns
  - utils/ - dependencies, process management, logging
  - config.py - centralized configuration with env var support

- Add type hints to function signatures
- Replace bare except clauses with specific exceptions
- Add proper logging module (replaces print statements)
- Add environment variable support (INTERCEPT_* prefix)
- Add test suite with pytest
- Add Dockerfile for containerized deployment
- Add pyproject.toml with ruff/black/mypy config
- Add requirements-dev.txt for development dependencies

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

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

utils/logging.py

@@ -0,0 +1,30 @@
+"""Logging utilities for intercept application."""
+
+from __future__ import annotations
+
+import logging
+import sys
+
+from config import LOG_LEVEL, LOG_FORMAT
+
+
+def get_logger(name: str) -> logging.Logger:
+    """Get a configured logger for a module."""
+    logger = logging.getLogger(name)
+    if not logger.handlers:
+        handler = logging.StreamHandler(sys.stderr)
+        handler.setFormatter(logging.Formatter(LOG_FORMAT))
+        logger.addHandler(handler)
+        logger.setLevel(LOG_LEVEL)
+    return logger
+
+
+# Pre-configured loggers for each module
+app_logger = get_logger('intercept')
+pager_logger = get_logger('intercept.pager')
+sensor_logger = get_logger('intercept.sensor')
+wifi_logger = get_logger('intercept.wifi')
+bluetooth_logger = get_logger('intercept.bluetooth')
+adsb_logger = get_logger('intercept.adsb')
+satellite_logger = get_logger('intercept.satellite')
+iridium_logger = get_logger('intercept.iridium')