fix(mosaic): wire constrained recovery runtime boundaries

packages/mosaic/framework/tools/lease-broker/launch-runtime.py

@@ -97,6 +97,12 @@ def main(
     environment["MOSAIC_RUNTIME_GENERATION"] = str(generation)
     environment["MOSAIC_LEASE_GENERATION_FILE"] = str(generation_file)
     environment["MOSAIC_LEASE_RUNTIME"] = arguments.runtime
+    # Matches daemon.py's production default; deployments using a distinct
+    # observer socket may set this authenticated transport path explicitly.
+    environment.setdefault(
+        "MOSAIC_RECEIPT_OBSERVER_SOCKET",
+        str(socket_path.with_name("receipt-observer.sock")),
+    )
     try:
         execute(command[0], command, environment)
     except OSError: