0.5.0

Added

• Resolve publication_url dynamically against Substack subdomains and custom domains.
• Allow optional timeout configuration for the API client and CLI.
• Detect local image MIME types (JPEG, PNG, GIF, WebP) for uploads instead of defaulting to JPEG.
• Add Dependabot configuration (#74).

Improved

• Raise SubstackRequestException explicitly instead of failing silently when a publication is unavailable.
• Expand secret redaction to cookie-like values in request error messages to prevent credential leaks.
• Ensure bounded retries apply strictly to safe GET and DELETE requests only.
• Bump fastmcp from 3.2.0 to 3.4.7 (#73).
• Bump markdown-it-py from 3.0.0 to 4.2.0 (#72).
• Bump pre-commit from 4.6.1 to 4.6.2 (#71).
• Bump requests from 2.33.0 to 2.34.2 (#70).
• Bump python-dotenv from 1.2.2 to 1.2.3 (#69).