revert: serve status RPC over goridge net/rpc, keep the new API

[rustatian]

Part of the org-wide Connect-RPC revert: the RPC surface returns to net/rpc over the goridge codec while keeping the new api-go message set and method names. Connect handlers were converted in place, connect-only API tests removed, and api-go/goridge/rpc are pinned to the revert branches (pseudo-versions to be replaced by tags).

[Copilot]

Pull request overview

This PR reverts the status RPC transport from Connect-RPC back to net/rpc over the goridge codec, while retaining the newer api-go v2 message types and method names.

Changes:

• Replaced Connect-RPC handlers with net/rpc-style service methods (Status, Ready) returning errors directly.
• Updated integration tests to dial net/rpc via goridge and removed Connect-only assertions/tests.
• Adjusted module dependencies to drop Connect-RPC and pin api-go/goridge/http/jobs/rpc to revert-branch pseudo-versions.

Reviewed changes

Copilot reviewed 7 out of 9 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/plugin_test.go	Switches status RPC integration tests from Connect client to net/rpc goridge client.
tests/go.mod	Removes Connect deps; adds/pins goridge + revert-branch pseudo-versions.
tests/go.sum	Updates sums to reflect dependency removals/pins.
rpc.go	Replaces Connect handler signatures with net/rpc method signatures and error returns.
rpc_test.go	Deletes Connect-specific unit test for Connect error code mapping.
plugin.go	Changes plugin RPC exposure from Connect handler/path to returning a net/rpc service instance.
go.mod	Removes Connect dependency and pins api-go to revert-branch pseudo-version.
go.sum	Updates sums to reflect dependency removals/pins.
go.work.sum	Updates workspace sums after dependency graph changes.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.30%. Comparing base (5baead8) to head (90465f0).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #134      +/-   ##
==========================================
- Coverage   92.43%   92.30%   -0.13%     
==========================================
  Files           6        6              
  Lines         370      364       -6     
==========================================
- Hits          342      336       -6     
  Misses         16       16              
  Partials       12       12              

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