fix: recover from 413 Request Entity Too Large via auto-compaction (#14707)

Co-authored-by: Noam Bressler <noamzbr@gmail.com>

packages/opencode/src/session/prompt.ts

@@ -533,6 +533,7 @@ export namespace SessionPrompt {
           abort,
           sessionID,
           auto: task.auto,
+          overflow: task.overflow,
         })
         if (result === "stop") break
         continue
@@ -707,6 +708,7 @@ export namespace SessionPrompt {
           agent: lastUser.agent,
           model: lastUser.model,
           auto: true,
+          overflow: !processor.message.finish,
         })
       }
       continue