feat: Add detailed IndieAuth logging with security-aware token redaction

- Add logging helper functions with automatic token redaction
- Implement comprehensive logging throughout auth flow
- Add production warning for DEBUG logging
- Add 14 new tests for logging functionality
- Update version to v0.7.0

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

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

starpunk/__init__.py

@@ -3,9 +3,54 @@ StarPunk package initialization
 Creates and configures the Flask application
 """
 
+import logging
 from flask import Flask
 
 
+def configure_logging(app):
+    """
+    Configure application logging based on LOG_LEVEL
+
+    Args:
+        app: Flask application instance
+    """
+    log_level = app.config.get("LOG_LEVEL", "INFO").upper()
+
+    # Set Flask logger level
+    app.logger.setLevel(getattr(logging, log_level, logging.INFO))
+
+    # Configure handler with detailed format for DEBUG
+    handler = logging.StreamHandler()
+
+    if log_level == "DEBUG":
+        formatter = logging.Formatter(
+            "[%(asctime)s] %(levelname)s - %(name)s: %(message)s",
+            datefmt="%Y-%m-%d %H:%M:%S",
+        )
+
+        # Warn if DEBUG enabled in production
+        if not app.debug and app.config.get("ENV") != "development":
+            app.logger.warning(
+                "=" * 70
+                + "\n"
+                + "WARNING: DEBUG logging enabled in production!\n"
+                + "This logs detailed HTTP requests/responses.\n"
+                + "Sensitive data is redacted, but consider using INFO level.\n"
+                + "Set LOG_LEVEL=INFO in production for normal operation.\n"
+                + "=" * 70
+            )
+    else:
+        formatter = logging.Formatter(
+            "[%(asctime)s] %(levelname)s: %(message)s", datefmt="%Y-%m-%d %H:%M:%S"
+        )
+
+    handler.setFormatter(formatter)
+
+    # Remove existing handlers and add our configured handler
+    app.logger.handlers.clear()
+    app.logger.addHandler(handler)
+
+
 def create_app(config=None):
     """
     Application factory for StarPunk
@@ -23,6 +68,9 @@ def create_app(config=None):
 
     load_config(app, config)
 
+    # Configure logging
+    configure_logging(app)
+
     # Initialize database
     from starpunk.database import init_db
 
@@ -105,5 +153,5 @@ def create_app(config=None):
 
 # Package version (Semantic Versioning 2.0.0)
 # See docs/standards/versioning-strategy.md for details
-__version__ = "0.6.2"
-__version_info__ = (0, 6, 2)
+__version__ = "0.7.0"
+__version_info__ = (0, 7, 0)