fix(openapi): Add defaults to rpc methods where needed (#8616)

* add defaults for `getpeerinfo` and `getblocksubsidy`

* add default for `getmininginfo`

* add default to `getblockcount`

* add defaults to `getaddressbalance`, `getaddressutxos` and `getaddresstxids`

* add defaults to `validateaddress` and `z_validateaddress`

* add defaults to `getrawmempool` and `getdifficulty`

* add defaults to `sendrawtransaction` and `getrawtransaction`

* add defaults for `getnetworksolps` and `getnetworkhashps`

* add defaults for `submitblock` and `z_listunifiedreceivers`

* refactor and cleanup

* update spec

* add random request id

* add min transaction size to `GetRawTransaction` default

* improve `GetSubtrees` default

* change type to request id

* get new spec

* add a TODO

* add changelog entry

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 - We're no longer using general conditional compilation attributes for `tor`,
   but only feature flags instead.
 - Fixed a bug with trailing characters in the openapi spec method descriptions ([#8597](https://github.com/ZcashFoundation/zebra/pull/8597))
+- Added default constructions for several RPC method responses([#8616](https://github.com/ZcashFoundation/zebra/pull/8616))
 
 ## [Zebra 1.7.0](https://github.com/ZcashFoundation/zebra/releases/tag/v1.7.0) - 2024-05-07
 

Cargo.lock

@@ -6149,6 +6149,7 @@ dependencies = [
  "itertools 0.13.0",
  "jsonrpc",
  "quote",
+ "rand 0.8.5",
  "regex",
  "reqwest",
  "serde",