PLU-309: [TILES-ATOMIC-INCREMENT-4] backend implementation for increment/decrement row value

[pregnantboy]

TL;DR

Add backend implementation for 'add' and 'subtract' operations for Tiles update row action

What changed?

• Modified patchTableRow to handle mathematical operations
  • added tests
  • error handling for invalid numeric operations
• Updated column metadata for tiles action to maintain column ordering
  • Fixed variable sorting logic for null order values

How to test?

1. Create a tile with a few columns and values that are both numbers and strings
2. Test updating cells using:
   • normal updates (set as)
   • adding
   • subtracting
   • mixed
3. Verify error handling by:
   • Attempting math operations on non-numeric values (both original values and operands)
4. Check that columns maintain their order in the UI

Regression test

1. Check that existing tiles update rows are still working

[pregnantboy]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• PLU-309: [TILES-ATOMIC-INCREMENT-4] backend implementation for increment/decrement row value #835 👈 (View in Graphite)
• PLU-309: [TILES-ATOMIC-INCREMENT-3] enhance multirow-multicol UI with custom styles and operators #819
• PLU-818: [TILES-ATOMIC-INCREMENT-2] use .data() to automically update nested objects #818
• PLU-817: [TILES-ATOMIC-INCREMENT-1] allowing copying of row id in tiles #817
• develop-v2

This stack of pull requests is managed by Graphite. Learn more about stacking.

[datadog-opengovsg]

Datadog Report

Branch report: feat/tiles/update-operator-backend
Commit report: 6419851
Test service: plumber

✅ 0 Failed, 736 Passed, 0 Skipped, 2m 4.48s Total Time
⬆️ Test Sessions change in coverage: 1 increased (+0.07%)

[linear]

PLU-309 Tiles: Increment counter action