docs: replace vague provenance prose with recorded facts

packages/session-query/tool-session-query/src/index.ts

@@ -95,7 +95,7 @@ export function apply(ctx: Context, config: Config): void {
 
   ctx.tools.register(defineTool({
     name: 'session_event_trace',
-    description: 'Read every direct replacement and provenance relationship for one event in an authorized session.',
+    description: 'Read every direct replacement and relationship to a cited source event for one event in an authorized session.',
     parameters: {
       ...toolInput.targetSessionParameter,
       seq: { type: 'integer', required: true, description: 'Target event sequence number.' },

packages/session-query/tool-session-query/src/presentation.ts

@@ -157,7 +157,7 @@ function formatEventTrace(
     `Replaced by: ${trace.replacedBy ?? 'none'}`,
     `Replacement chain: ${seqList(trace.replacementChain)}`,
     `Events replaced by target: ${seqList(trace.replacedEventSeqs)}`,
-    `Direct provenance sources: ${seqList(trace.sourceEventSeqs)}`,
+    `Events cited directly as sources: ${seqList(trace.sourceEventSeqs)}`,
     `Direct derived events: ${seqList(trace.derivedEventSeqs)}`,
   ].join('\n')
 }