feat: Full offline support with Room 3 + Store 5 + Security

[therajanmaurya]

Summary

• Room 3 (3.0.0-alpha03) migration with encrypted TypeConverters
• Store 5 (5.1.0-alpha08) for full offline cache with SourceOfTruth
• Security module (FieldEncryptor, SecurityGate, SessionManager)
• DataStore dual-store (plain + secure) with write-before-delete migration
• Staleness UI showing data freshness on every cached screen
• 10 new Room entities + DAOs for complete offline coverage
• Every list/detail screen works from cache when offline

Plan

Implementing PLAN-migration-mifos-mobile-260501

Progress

• Phase 0: sync-dirs (core-base/security, store, database)
• Phase 1: Gradle verification + additions
• Phase 2: Security + DI verification
• Phase 3D: TypeConverter encryption
• Phase 4: DataStore dual-store verification
• Phase 6: DI wiring order
• Phase 7: SecurityGate wrapping
• Phase 3A: Fix ChargeEntity/DAO gaps
• Phase 3B: 10 new entities
• Phase 3B-extra: 10 mapper files
• Phase 3C: 10 new DAOs
• Phase 3E: AppDatabase update (version bump)
• Phase 5A: DataFreshnessIndicator + CachedData wrapper
• Phase 5B: 10 offline repos with Store 5
• Phase 5C: 6 memory stores
• Phase 5D: ViewModel/screen staleness wiring
• Phase 8: Verification

Test plan

• ./gradlew :cmp-android:assembleDemoDebug passes
• ./gradlew :core:database:kspKotlinIosArm64 passes
• Offline mode: airplane mode → screens load from cache
• Staleness: cached data shows "Updated X min ago" banner
• Encryption: TypeConverter values have ENC: prefix

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