fix(javascript)!: avoid event payload copies in graph metadata (#1427)

Share the canonical string identity rule with endpoint projection, scope event keys to each emitter, and keep complete event/listener names in properties. Verify real CLI and stdio MCP with large names, registration/removal, distinct emitters, exact name seeds, reserved-prefix values, and unresolved dynamic names.

BREAKING CHANGE: New analyses use digest-based IDs for long or reserved-prefix event names and shorter event/listener display labels. Select IDs from the parent graph and read exact names from event_name properties. Stored graphs and their original IDs remain accepted for semantic tracing.

docs/javascript-application-workflows.md

@@ -118,6 +118,16 @@ Use IDs from the selected graph and read the complete endpoint properties;
 previously stored graphs still support their original IDs. Literal endpoint
 search, semantic tracing, and version comparison use the preserved values.
 
+Event and listener nodes likewise preserve the complete event name in
+`properties.event_name`. Event role keys use the same reserved-prefix string
+digest rule, scoped to the emitter; repeated registrations, removals, and
+dispatches keep one event per exact emitter/name pair. Long event labels use
+`event`, and listener labels use the shorter of `<method>:<name>` and
+`<method>:listener`. Dynamic names remain `null` with explicit uncertainty. New analyses
+change hashed event IDs and longer event/listener labels; query the preserved
+name or select IDs from the parent graph. Previously stored graphs keep their
+original IDs and remain valid trace inputs.
+
 ## Version comparison
 
 REA pairs entities only when a tier produces one unique candidate on each side.