feat: add inline external generation mode

server-rs/crates/api-server/src/puzzle.rs

@@ -136,9 +136,27 @@ const PUZZLE_VECTOR_ENGINE_PORTRAIT_IMAGE_SIZE: &str = "1024x1536";
 
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub(crate) struct ExternalGenerationWriteLeaseGuard {
-    pub(crate) job_id: String,
-    pub(crate) worker_id: String,
-    pub(crate) lease_token: String,
+    pub(crate) job_id: Option<String>,
+    pub(crate) worker_id: Option<String>,
+    pub(crate) lease_token: Option<String>,
+}
+
+impl ExternalGenerationWriteLeaseGuard {
+    pub(crate) fn inline() -> Self {
+        Self {
+            job_id: None,
+            worker_id: None,
+            lease_token: None,
+        }
+    }
+
+    pub(crate) fn from_claimed_job(job_id: String, worker_id: String, lease_token: String) -> Self {
+        Self {
+            job_id: Some(job_id),
+            worker_id: Some(worker_id),
+            lease_token: Some(lease_token),
+        }
+    }
 }
 
 #[derive(Debug)]
@@ -166,6 +184,10 @@ impl PuzzleExternalGenerationWorkerError {
         self.error.body_text()
     }
 
+    pub(crate) fn into_app_error(self) -> AppError {
+        self.error
+    }
+
     pub(crate) fn should_fail_queue_job(&self) -> bool {
         self.should_fail_queue_job
     }