GTFS-RT Trip Update schedule status > fix wrong 1 min validity

[mmathieum]

Also clarify useful VS validity.
Also fixes UI showing static data every min before reloading RT data (because 1 min old RT data was not "useful")

• Status (schedule, availability...) > clarify useful VS validity 🤯 #179

[Copilot]

Pull request overview

This PR clarifies and corrects “useful vs validity” semantics for status objects, particularly for GTFS-RT Trip Updates, so that real-time data isn’t treated as “not useful” after only 1 minute (which was causing the UI to fall back to static data before RT refresh completes).

Changes:

• Rename/standardize status expiry from validityInMs to maxValidityInMs across POIStatus-based models and provider contract columns.
• Update GTFS-RT Trip Updates schedule creation to use the provider’s max validity rather than the 1-minute refresh validity.
• Add isValid() helpers (and refactor isUseful() to delegate) for clearer status staleness checks.

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/test/java/org/mtransit/android/commons/provider/status/GTFSRealTimeTripUpdatesProviderTests.kt	Updates test schedule construction to use maxValidityInMs.
src/main/java/org/mtransit/android/MtLogExt.kt	Adjusts date-time log formatting (time style).
src/main/java/org/mtransit/android/commons/provider/status/StatusProviderContract.kt	Renames projection/column constant to T_STATUS_K_MAX_VALIDITY and keeps max validity defaults.
src/main/java/org/mtransit/android/commons/provider/status/StatusProvider.java	Maps DB validity column to the renamed contract column alias.
src/main/java/org/mtransit/android/commons/provider/status/GTFSRealTimeTripUpdatesProvider.kt	Uses statusMaxValidityInMs when building/caching schedules for trip updates.
src/main/java/org/mtransit/android/commons/data/ServiceUpdate.java	Refactors usefulness to isValid() for clarity.
src/main/java/org/mtransit/android/commons/data/ScheduleExt.kt	Renames schedule factory parameter and introduces makeSchedule2 with deprecation wrapper.
src/main/java/org/mtransit/android/commons/data/Schedule.java	Switches schedule usefulness to isValid() and adds an overridden validity rule.
src/main/java/org/mtransit/android/commons/data/POIStatus.java	Renames stored validity field to maxValidityInMs, updates cursor/ContentValues mapping, and adds isValid().
src/main/java/org/mtransit/android/commons/data/News.java	Refactors usefulness to isValid() and modernizes hashCode() implementation for longs.
src/main/java/org/mtransit/android/commons/data/AvailabilityPercent.java	Uses getMaxValidityInMs() when copying from a POIStatus.
src/main/java/org/mtransit/android/commons/data/AppStatus.java	Uses getMaxValidityInMs() when copying from a POIStatus.