feat(corp/rih): add UUIDs to records from frontend

This UUID stays the same even if a user submits the form multiple
times (unless they edit it manually in local storage, of course).

Change-Id: I4190fbfeb1027ce8a8d87bc283099539e8722b39
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8733
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI

corp/rih/frontend/Cargo.lock

@@ -1092,6 +1092,7 @@ dependencies = [
  "serde_json",
  "serde_urlencoded",
  "static_markdown",
+ "uuid",
  "wasm-bindgen",
  "wasm-bindgen-futures",
  "web-sys",
@@ -1465,6 +1466,16 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
 
+[[package]]
+name = "uuid"
+version = "1.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "345444e32442451b267fc254ae85a209c64be56d2890e601a0c37ff0c3c5ecd2"
+dependencies = [
+ "getrandom",
+ "serde",
+]
+
 [[package]]
 name = "version_check"
 version = "0.9.4"