Keep recovery metadata after branch parent field

Restore the compact() source-order expectation used by the branch metadata contract test while keeping focused compression recovery markers in the compact payload.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

api/models.py

@@ -1439,16 +1439,16 @@ class Session:
             'last_prompt_tokens': self.last_prompt_tokens,
             'compression_recovery': self.compression_recovery,
             'recommended_recovery_action': self.recommended_recovery_action,
-            **({
-                'compression_recovery_source_session_id': self.compression_recovery_source_session_id,
-                'compression_recovery_action': self.compression_recovery_action,
-            } if (self.compression_recovery_source_session_id or self.compression_recovery_action) else {}),
             'gateway_routing': self.gateway_routing,
             'gateway_routing_history': self.gateway_routing_history,
             'manual_title': self.manual_title,
             # Only emit 'parent_session_id' when set (the /branch fork link, #1342).
             # Sessions without a fork must not leak None — see test_session_lineage_metadata_api.
             **({'parent_session_id': self.parent_session_id} if self.parent_session_id else {}),
+            **({
+                'compression_recovery_source_session_id': self.compression_recovery_source_session_id,
+                'compression_recovery_action': self.compression_recovery_action,
+            } if (self.compression_recovery_source_session_id or self.compression_recovery_action) else {}),
             **({
                 'worktree_path': self.worktree_path,
                 'worktree_branch': self.worktree_branch,