Implement unified time testing with controllable app_now() function

[tonyalaribe]

Summary

This PR introduces a unified time testing system that allows tests to control time across both Haskell effects and PostgreSQL triggers/defaults. It replaces the frozen time approach with a mutable, advanceable test clock that syncs with PostgreSQL's app_now() function via a custom GUC variable.

Key Changes

Database Migration

• Added static/migrations/0033_app_now_function.sql which:
  • Creates app_now() function that reads from app.current_time GUC variable, falling back to NOW() in production
  • Updates set_updated_at() trigger to use app_now()
  • Updates new_anomaly_proc(), check_triggered_query_monitors(), and check_tests_to_trigger() procedures to use app_now() for background job scheduling

New Test Clock Module

• Created src/Pkg/TestClock.hs providing:
  • TestClock type backed by an IORef UTCTime
  • advanceTime and setTestTime for controlling the test clock
  • runMutableTime to interpret the Time effect from a mutable clock
  • syncConnectionTime to sync the test clock to PostgreSQL's GUC on each connection checkout
  • runWithTimeSyncedPool to wrap connection pools with automatic time synchronization

Test Infrastructure Updates

• Updated Pkg.TestUtils to:
  • Accept TestClock parameter in background job runners
  • Export time advancement helpers (advanceTestTime, advanceMinutes, advanceHours, advanceDays)
  • Create and manage TestClock in TestResources
  • Use runMutableTime and runWithTimeSyncedPool instead of runFrozenTime

Query Updates for Time Consistency

• Updated multiple query functions to accept Time :> es constraint and use Time.currentTime instead of NOW():
  • Models.Apis.RequestDumps: getRequestDumpForReports, getRequestDumpsForPreviousReportPeriod
  • Models.Telemetry.Telemetry: getDataPointsData, getMetricChartListData
  • Models.Apis.Anomalies: countAnomalies, acknowledgeAnomalies
  • Models.Apis.Issues: updateIssueWithNewAnomaly, updateIssueEnhancement
  • Models.Apis.LogPatterns: acknowledgeLogPatterns
  • Models.Apis.Monitors: updateQMonitorTriggeredState
  • Models.Projects.Projects: projectCacheById
  • Models.Projects.ProjectMembers and Models.Projects.ProjectApiKeys: Similar updates

Test Updates

• Updated integration tests to:
  • Pass TestClock to background job runners and response handlers
  • Use getTestTime instead of getCurrentTime for test assertions
  • Remove dependency on runFrozenTime in favor of mutable clock

Implementation Details

• The test clock is synced to PostgreSQL connections via set_config('app.current_time', ?, true) which makes the setting transaction-scoped and auto-resets when connections return to the pool
• All time-dependent queries now explicitly use the test clock's time rather than relying on database-side NOW() calls
• This ensures consistent time behavior across Haskell effects, background job scheduling, and database triggers during testing

https://claude.ai/code/session_019Mn7XLed4oq6j7dWqciekH