This adds support for using the webserver's public image URL system in Gotify notifications, allowing images to be viewed from external networks without authentication. Also improves image quality configuration for high-resolution cameras.

Depends on: Public image URL system (#PR1_NUMBER)

Features:
- New option: use_public_url (default: false) to use public URLs instead of base64
- Images are now persistent and accessible after Viseron restart
- Configurable image quality (image_quality: 1-100, default: 95)
- Configurable image size (image_max_size: 0-7680, default: 800)
  - Set to 0 to disable resizing (use original camera resolution)
  - Recommended: 1920 for 4K cameras, 0 for maximum quality
- Images saved to persistent directory instead of /tmp/
- Retrieves public_base_url and public_url_expiry_hours from webserver config

Configuration changes:
- Moved public_base_url to webserver config (was in Gotify)
- Moved public_url_expiry_hours to webserver config (was in Gotify)
- These are now global settings usable by all notification components

Image quality improvements:
- Base64 images now use configured JPEG quality
- Public URL images use configured quality and size
- Fixes low quality issue with 4K cameras (was hardcoded to 800px)

Example configuration:
```yaml
webserver:
  public_base_url: "https://viseron.example.com"
  public_url_expiry_hours: 168  # 7 days

gotify:
  gotify_url: "https://gotify.example.com"
  gotify_token: "your-token"
  use_public_url: true
  image_max_size: 1920  # For 4K cameras
  image_quality: 95     # High quality JPEG
  cameras:
    camera_name: {}
```

Fixes:
- Images from 4K cameras are no longer limited to 800x450px
- Public URLs survive container restarts
- Better image quality control for all notification types

…blic-url-support

- Break long log messages to stay within 88 character limit
- Use %s formatting instead of f-strings for long messages
- Shorten comments while preserving meaning

…blic-url-support

- Move WEBSERVER_COMPONENT import to module level
- Break long DESC_IMAGE_QUALITY string across lines
- Remove useless broad-except suppression comment

…blic-url-support

Add documentation for new Gotify features:
- use_public_url option to generate temporary public URLs for images
- image_max_size to control thumbnail dimensions (default 800px)
- image_quality to control JPEG quality (default 95)

These options allow better control over image delivery and file sizes.

…blic-url-support

Add configurable download limit for public image tokens to automatically
delete images after a specified number of downloads.

Changes:
- Add remaining_downloads field to PublicImageToken dataclass
- Implement download counter decrement in publicimage API
- Add automatic cleanup after final download
- Add public_url_max_downloads configuration parameter (default: 0 = unlimited)
- Update webserver documentation with usage examples

Configuration:
- 0 (default): Unlimited downloads
- 1: Single-use URL (perfect for notifications)
- N > 1: Limited sharing (delete after N downloads)

…blic-url-support

Add download limit feature for public image URLs.

Update Gotify component to use the new public_url_max_downloads
configuration parameter when creating public image tokens.

Changes:
- Get max_downloads from webserver configuration
- Pass max_downloads as remaining_downloads to PublicImageToken
- Default behavior: 0 = unlimited downloads (only time expiration applies)