v4.0.0

Breaking Changes

• Require Elixir 1.15 or later
• Validate required configuration during backend initialization and return an error when :token or :chat_id is missing

Changes

• Require finch 0.22 or later when using the built-in HTTP client
• Require logger_backends 1.0 or later
• Test compatibility with Elixir 1.18 and OTP 27

Bug fixes

• Fix message truncation to respect Telegram 4096-character message limit after HTML parsing
• Preserve part of the message budget when truncating large metadata payloads
• Avoid rendering an empty <pre> block when no metadata is included
• Log send failures to stderr without emitting warning stacktrace noise
• Fix the HTTP client test filename typo
• Fix README and documentation typos