Function process_safe 

pub fn process_safe<F>(content: &str, processor_fn: F, fallback: &str) -> String
where
    F: FnOnce(&str) -> String,

Safely process markup content with error recovery.

Provides a safe wrapper around markup processing operations that may fail, and ensures that partial or fallback content is returned rather than complete failure.

Arguments

• content - The content to process
• processor_fn - The processing function to apply
• fallback - Fallback content to use if processing fails

Returns

The processed content or fallback on error