runs and jobs [LET-4634] (#5427)

runs and jobs

Co-authored-by: Ari Webb <ari@letta.com>

letta/errors.py

@@ -19,6 +19,7 @@ class ErrorCode(Enum):
     RATE_LIMIT_EXCEEDED = "RATE_LIMIT_EXCEEDED"
     TIMEOUT = "TIMEOUT"
     CONFLICT = "CONFLICT"
+    EXPIRED = "EXPIRED"
 
 
 class LettaError(Exception):
@@ -141,6 +142,13 @@ class LettaUnexpectedStreamCancellationError(LettaError):
     """Error raised when a streaming request is terminated unexpectedly."""
 
 
+class LettaExpiredError(LettaError):
+    """Error raised when a resource has expired."""
+
+    def __init__(self, message: str):
+        super().__init__(message=message, code=ErrorCode.EXPIRED)
+
+
 class LLMError(LettaError):
     pass