chore: merge dev into v2 (#34317)

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specs/v2/schema-changelog.md

@@ -1,5 +1,12 @@
 # V2 Schema Changelog
 
+## 2026-06-26: Add Finite Session History
+
+- Add `GET /api/session/:sessionID/history` and generated Promise, Effect, and legacy JavaScript client methods.
+- Page public durable Session events after an optional exclusive aggregate sequence, with an explicit `hasMore` exhaustion signal.
+- Keep aggregate gaps legal, cap pages at 100 events, and preserve the existing durable replay-and-tail `sessions.events()` stream unchanged.
+- Add no migration or durable-event version; this is a finite read API over the existing event manifest.
+
 ## 2026-06-22: Simplify Session Input Promotion
 
 - Keep `session.next.prompt.admitted.1` as the durable, client-visible record of pending Session input.