JtxCollection: Add CRUD operations for JtxICalObject

[sunkup]

Purpose

Add comprehensive create, read, update, and delete operations for managing JtxICalObject items (vtodo, vjournal) within jtx collections.

Short description

• Add methods for inserting objects: addJtxObject() with batch support
• Add query methods: countJtxObjects(), findJtxObject(), findJtxObjects(), getJtxObject(), getJtxObjectRow()
• Add iteration methods: iterateJtxObjects(), iterateJtxObjectRows()
• Add update methods: updateJtxObject(), updateJtxObjectRow(), updateJtxObjectRows() with batch support
• Add delete methods: deleteJtxObject() with batch support and cascade deletion of sub-rows
• Properly handle Entity objects with sub-rows (attendees, categories, alarms, etc.)
• Include helper methods for batch operations and collection isolation
• Add comprehensive test coverage in JtxCollectionTest.kt

Note

For reviewing it might be interesting to compare with AndroidCalendar.kt. Notice that the workaround for the calendarprovider bug addressed in AndroidCalendar.kt is of course not needed for JtxBoard.

[Copilot]

Pull request overview

Adds first-class CRUD support for jtx Board JtxICalObject items within JtxCollection, including entity (main row + sub-rows) handling and a comprehensive Android instrumentation test suite to validate behavior.

Changes:

• Implemented insert/query/iterate/update/delete APIs for jtx objects, supporting both ContentValues (main row only) and Entity (main row + sub-rows).
• Added helper utilities for collection-scoped selection building and for loading sub-rows into Entity.
• Added Android instrumentation tests covering CRUD flows, batching, cascade deletion, and collection isolation.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
lib/src/main/kotlin/at/bitfire/synctools/storage/jtx/JtxCollection.kt	Adds CRUD APIs for JtxICalObject plus helper methods/constants for scoping queries and handling sub-rows.
lib/src/androidTest/kotlin/at/bitfire/synctools/storage/jtx/JtxCollectionTest.kt	New instrumentation tests validating the new CRUD behavior (including batch ops and sub-row handling).

[cketti]

👍