fix(mcp): teach the assistant test stub the scheduling methods

[localai-bot]

Problem

master does not compile its test suite. lint and tests are both red on the three most recent commits (8f74f74b, fd4ec083, 8a68f357) and green on cd62e8ff, the one before.

core/http/endpoints/mcp/localai_assistant_test.go:150:28: cannot use stubClient{}
  (value of struct type stubClient) as localaitools.LocalAIClient value in argument
  to h.Initialize: stubClient does not implement localaitools.LocalAIClient
  (missing method DeleteScheduling)

Cause

#11228 added four methods to the localaitools.LocalAIClient interface:

ListScheduling(ctx context.Context) ([]ModelSchedulingConfig, error)
GetScheduling(ctx context.Context, modelName string) (*ModelSchedulingConfig, error)
SetScheduling(ctx context.Context, req SetSchedulingRequest) (*ModelSchedulingConfig, error)
DeleteScheduling(ctx context.Context, modelName string) error

The two real implementations (inproc and httpapi) were updated. stubClient, the hand-written test double in the mcp endpoints package, was not, so that package fails to typecheck. Go reports only the first missing method, which is why the error names DeleteScheduling alone.

Fix

Add the four methods with the same inert bodies the rest of the stub already uses. The real implementations are covered by the localaitools suites; this double exists only so the holder can be constructed.

Verification

• go vet clean on ./pkg/mcp/localaitools/, ./pkg/mcp/localaitools/inproc/, ./pkg/mcp/localaitools/httpapi/, ./core/http/endpoints/mcp/ and ./core/http/routes/, all of which failed or were at risk before.
• go test ./core/http/endpoints/mcp/ ./pkg/mcp/localaitools/... -> 4 packages ok.
• Checked for other implementers repo-wide: inproc, httpapi and the fakeClient in localaitools/fakes_test.go all already satisfy the interface. stubClient was the only gap.