Release v1.11.2

What's Changed

• runner: deduplicate event persistence by @Rememorio in #2460
• knowledge: align root module versions by @print-happy in #2469
• {internal/state/summaryfork, internal/state/summaryview}: avoid cloning immutable invocation snapshots by @Rememorio in #2476
• model/openai: use max_tokens for DeepSeek by @Rememorio in #2480
• session/mysql: support legacy summary indexes by @Rememorio in #2474
• internal/flow/llmflow: preserve compaction lineage through request transforms by @Rememorio in #2485
• internal/skillstage: tolerate chmod denial when restaging skills by @liuzengh in #2486
• telemetry/langfuse: restore legacy fallback for empty Input/Output by @liuzengh in #2477

Full Changelog: v1.11.1...v1.11.2