Function default_classifier 

pub fn default_classifier(key: &str) -> RhetoricalCategory

Default template-key classifier used by GroupingStrategy::ByAction.

Looks at the last dotted segment of the key and maps well-known action names to RhetoricalCategory:

• deleted, removed → RhetoricalCategory::Removal
• added, created, introduced → RhetoricalCategory::Addition
• modified, updated, renamed, moved, signature_changed → RhetoricalCategory::Modification
• anything else → RhetoricalCategory::Other

Use DocumentPlan::from_events_classified to supply a custom classifier when the defaults don’t fit the domain.