Make logging optional with --logging flag in installer

[Helmi]

Description

Make logging functionality optional and disabled by default to prevent log files from growing too large. Logging should only be enabled when explicitly requested via a --logging flag during installation or update.

Context

Project area: Installer, CLI, Core functionality
Complexity: 5/10 (moderate)
Current state: Logging is always enabled and can create large log files over time

Technical Details

Affected files:

• src/ccnotify/cli.py - Add --logging flag to install/update commands
• src/ccnotify/installer/flows.py - Pass logging preference to hook configuration
• src/ccnotify/cli.py::update_claude_settings() - Update hook command with/without --logging
• src/ccnotify/notify.py - Accept --logging argument and conditionally enable logging
• README.md - Document the new logging option

Requirements

1. Installer Changes

   • Add --logging flag to the install and update commands
   • When --logging is used, configure hooks to call the script with --logging
   • When not used, configure hooks without the logging flag
   • Update existing installations to remove logging if not specified

2. Script Changes

   • Modify notify.py to accept a --logging command-line argument
   • Only enable logging when the flag is present
   • Keep existing logging behavior when flag is used
   • Completely disable logging (no file creation) when flag is absent

3. Hook Configuration

   • Update update_claude_settings() to conditionally add --logging to the hook command
   • Ensure the hook command is:
     • With logging: uv run /path/to/ccnotify.py --logging
     • Without logging: uv run /path/to/ccnotify.py

4. Documentation

   • Update README.md to document the --logging flag
   • Explain that logging is off by default
   • Show how to enable logging during installation

Implementation Steps

• Add --logging flag to CLI install/update commands in cli.py
• Modify BaseFlow._configure_claude_hooks() to accept logging preference
• Update update_claude_settings() to conditionally add --logging to hook command
• Add --logging argument parser to notify.py
• Modify setup_logging() in notify.py to check for the flag
• Test installation with and without --logging flag
• Verify hooks are configured correctly in both cases
• Update README.md with logging documentation
• Test that existing installations can be updated to remove logging

Acceptance Criteria

• uvx ccnotify install installs without logging by default
• uvx ccnotify install --logging installs with logging enabled
• Hook commands in Claude settings reflect the logging preference
• No log files are created when logging is disabled
• Existing installations can be updated to change logging preference
• Documentation clearly explains the logging option
• Script runs correctly with and without the --logging flag