Adds scheduling cancellation support

[PascalSenn]

No description provided.

[Copilot]

Pull request overview

This PR introduces first-class scheduling APIs that return an opaque cancellation token, along with store-level cancellation support and corresponding test coverage. It also consolidates scheduling types into the main Mocha project (removing the standalone Mocha.Scheduling project).

Changes:

• Add IMessageBus.Schedule*Async(...) APIs returning SchedulingResult, plus CancelScheduledMessageAsync(token, ...).
• Extend IScheduledMessageStore to return a token from PersistAsync and support CancelAsync(value, ...); implement Postgres cancellation SQL/store logic.
• Update/expand unit and integration tests to validate cancellable results and cancellation behavior.

Reviewed changes

Copilot reviewed 23 out of 29 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/Mocha/src/Mocha/IMessageBus.cs	Adds scheduling + cancellation methods to the public bus API.
src/Mocha/src/Mocha/Middlewares/DefaultMessageBus.cs	Implements scheduling methods returning SchedulingResult and token-based cancellation.
src/Mocha/src/Mocha/SchedulingResult.cs	New result type carrying token + scheduled time + cancellable flag.
src/Mocha/src/Mocha/Scheduling/IScheduledMessageStore.cs	Changes persistence contract to return tokens; adds cancellation method.
src/Mocha/src/Mocha/Scheduling/DispatchSchedulingMiddleware.cs	Captures store token into a pooled feature for the bus to return.
src/Mocha/src/Mocha/Features/ScheduledMessageFeature.cs	New pooled feature to flow the token back to the caller.
src/Mocha/src/Mocha/Scheduling/*	Adds scheduler core wiring, signal abstraction, and skip/bypass features.
src/Mocha/src/Mocha.EntityFrameworkCore.Postgres/Scheduling/ScheduledMessageQueries.cs	Adds SQL for cancelling scheduled messages.
src/Mocha/src/Mocha.EntityFrameworkCore.Postgres/Scheduling/EfCoreScheduledMessageStore.cs	Returns token on persist and implements cancellation via SQL delete.
src/Mocha/test/Mocha.EntityFrameworkCore.Postgres.Tests/PostgresSchedulingIntegrationTests.cs	Adds integration coverage for cancellable results + cancellation semantics in Postgres scheduling.
src/Mocha/test/Mocha.Tests/Scheduling/*	Updates/expands tests for new scheduling APIs and in-memory cancellation behavior.
src/Mocha/test/Mocha.Sagas.TestHelpers/TestMessageBus.cs	Updates test helper bus to satisfy new IMessageBus scheduling API surface.
.csproj / Mocha.slnx / src/Mocha/src/Mocha.Scheduling/	Removes the standalone Mocha.Scheduling project and related references.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (6a3b7a3) to head (c27fcf9).
⚠️ Report is 1061 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #9487       +/-   ##
==========================================
- Coverage   74.16%       0   -74.17%     
==========================================
  Files        2677       0     -2677     
  Lines      140790       0   -140790     
  Branches    16371       0    -16371     
==========================================
- Hits       104421       0   -104421     
+ Misses      30774       0    -30774     
+ Partials     5595       0     -5595     

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