RDKEMW-20349 : Change discovery.watchedV2 return type to void

[swethasukumarr]

No description provided.

[Copilot]

Pull request overview

Updates the Discovery watchedV2 API to be fire-and-forget (no return payload), aligning the C++ interface/implementation, tests, demo output, and OpenRPC fixtures with a void/null result.

Changes:

• Change Discovery.watchedV2 return type from Result<bool> to Result<void> and switch implementation from helper_.get(...) to helper_.invoke(...).
• Update unit/component tests and the API demo app to stop expecting a boolean result.
• Update OpenRPC fixtures to define a null result schema and null example values for watchedV2.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
include/firebolt/discovery.h	Updates the public interface return type and return docs for watchedV2.
src/discovery_impl.h	Updates DiscoveryImpl method signature to Result<void>.
src/discovery_impl.cpp	Implements watchedV2 as an invoke returning Result<void>.
test/unit/discoveryTest.cpp	Adjusts mocks and assertions for Result<void> and invoke(...).
test/component/discoveryTest.cpp	Removes boolean result expectation for watchedV2.
test/api_test_app/apis/discoveryDemo.cpp	Updates demo output to reflect no boolean return value.
docs/openrpc/the-spec/firebolt-open-rpc.json	Changes watchedV2 result schema/examples to null.
docs/openrpc/openrpc/discovery.json	Changes watchedV2 result schema/examples to null.