🔄 Sync main branch changes to net9

[arcenox]

🤖 Automated Branch Sync

This PR syncs recent changes from main branch to net9.

Changes Applied:

• ✅ Applied recent commits from main (using cherry-pick)
• ✅ Updated version numbers (10.x.x → 9.x.x)
• ✅ Updated target framework (net10.0 → net9.0)
• ✅ Preserved .csproj files from net9 branch
• ⏭️ Commits already in target branch were automatically excluded

Review Notes:

• All .csproj files maintain net9 configurations
• Directory.Build.props has been updated for net9 compatibility
• Ready for testing on net9 environment

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Created automatically by branch sync workflow

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Note

Replace scheduler timers with Task.Delay loops, refine next-ticker batching/selection, correct cron occurrence updates and execution times, and fix deletion routing.

• Scheduler/Background Services:
  • Replace PeriodicTimer loops with while + Task.Delay, using dynamic sleep durations and clearing execution context safely.
  • Adjust restart logic to trigger only when a new task is overdue or ≥500ms earlier than planned.
• Ticker selection/queuing:
  • Rewrite GetNextTickers to compute remaining time once, batch cron/time tickers when in the same second, and merge queued functions.
  • Add SafeRemaining helper for non-negative delays.
• Persistence (EF Core):
  • ReleaseAcquiredCronTickerOccurrences: simplify to use baseQuery directly.
  • QueueCronTickerOccurrences: set ExecutionTime from the group key (executionTime) instead of now.
  • UpdateCronTickerOccurrencesWithUnifiedContext: update by occurrence IDs (cronOccurrenceIds) via setter.UpdateCronTickerOccurrence.
• Other:
  • Fix DeleteTicker routing for cron vs time tickers.
  • Minor cleanup in InternalFunctionContext usings.

^{Written by Cursor Bugbot for commit 98ac6cc. This will update automatically on new commits. Configure here.}

[cursor]

Bug: Stray Merge Markers Break the Build

Merge conflict markers (<<<<<<< HEAD, =======, >>>>>>>) were accidentally left in the code within the UpdateCronTickerOccurrencesWithUnifiedContext method. This prevents the code from compiling and must be resolved by choosing the correct implementation.