Write specs for missing RPC endpoints

[cdelafuente-r7]

Summary

Many files for the RPC endpoints don't have specs.

$> ls -1 lib/msf/core/rpc/v10
client.rb
constants.rb
health.rb
rpc_auth.rb
rpc_base.rb
rpc_console.rb
rpc_core.rb
rpc_db.rb
rpc_health.rb
rpc_job_status_tracker.rb
rpc_job.rb
rpc_module.rb
rpc_plugin.rb
rpc_session.rb
service.rb

$> ls -1 spec/lib/msf/core/rpc/v10
rpc_console_spec.rb
rpc_core_spec.rb
rpc_job_status_tracker_spec.rb
rpc_session_spec.rb

$> ls -1R lib/msf/core/rpc/json
client.rb
dispatcher_helper.rb
dispatcher.rb
error.rb
request.rb
response.rb
rpc_command_factory.rb
rpc_command.rb
v1_0
v2_0

lib/msf/core/rpc/json/v1_0:
rpc_command.rb

lib/msf/core/rpc/json/v2_0:
rpc_test.rb

$> ls -1R spec/lib/msf/core/rpc/json
dispatcher_spec.rb

Motivation

Specs are crucial to ensure RPC endpoints work as expected at all times, especially now that they will be utilized by the MCP server.