chore: bump tokio to 1.147.1, slab to 0.4.11

Author: krsnapaudel

backend/Cargo.lock

@@ -17,7 +17,7 @@
     "alloc",
     "raw_value",
   ] }
-  tokio = { version = "1.47.0", features = [ "macros", "rt-multi-thread" ] }
+  tokio = { version = "1.47.1", features = [ "macros", "rt-multi-thread" ] }
   tower-http = { version = "0.6", features = [ "cors" ] }
   tracing = { version = "0.1" }
   tracing-subscriber = { version = "0.3.18", features = [ "env-filter" ] }