[FEATURE] Respond to api requests when YAML validation fails

[brooksmtownsend]

When I submit invalid YAML to wadm, I get timeout errors from the client, but in the wadm logs we have:

14:01:31.917 [error] Gnat.Server encountered an error while handling a request: %Protocol.UndefinedError{description: "", protocol: String.Chars, value: %YamlElixir.ParsingError{column: 9, line: 104, message: "Invalid sequence", type: :not_a_sequence}}
14:02:27.411 [error] Gnat.Server encountered an error while handling a request: %Protocol.UndefinedError{description: "", protocol: String.Chars, value: %YamlElixir.ParsingError{column: 9, line: 104, message: "Invalid sequence", type: :not_a_sequence}}
14:03:00.468 [error] Gnat.Server encountered an error while handling a request: %Protocol.UndefinedError{description: "", protocol: String.Chars, value: %YamlElixir.ParsingError{column: 19, line: 105, message: "Block mapping value not allowed here", type: :block_mapping_value_not_allowed}}

These happen quickly and should result in a YAML parsing error and not a timeout, this could just be modifying the API server flow for model put https://github.com/wasmCloud/wadm/blob/main/wadm/lib/wadm/api/api_server.ex#L121 so that requests that fail validation return an error instead of panicking

[brooksmtownsend]

Closing as this is no longer applicable