Upgrade rerun SDK minimum version to >=0.29.0 (#1037)

Summary:
Upgrade the rerun SDK minimum version for the `rerun-latest` feature from `>=0.28.0,<0.29` to `>=0.29.0` (open-ended).

## Changes
- **pixi.toml**: Updated `rerun-latest` feature dependencies to `>=0.29.0`
- **rerun_compat.h**: Updated documentation to reflect new minimum versions
- **pixi.lock**: Regenerated with `rerun-sdk 0.29.2`

## Rationale
- Proactively support newer rerun versions (0.29.x, 0.30.x, etc.) without manual updates
- The C++ compatibility layer (`rerun_compat.h`) already handles API differences via preprocessor guards
- No breaking API changes between 0.28.x and 0.29.x that affect this codebase
- The `rerun-legacy` feature remains at 0.23.x for internal BUCK build compatibility

## Testing
- `pixi run config`: CMake configuration successful ✅
- `pixi run build`: All 348 targets compiled ✅
- `pixi run test`: All 19 tests passed ✅

Similar to: #933

Pull Request resolved: #1037

Reviewed By: cstollmeta

Differential Revision: D93285834

Pulled By: jeongseok-meta

fbshipit-source-id: 62ca701eedfe12dedbf5bcc820b96040b265f228

Author: jeongseok-meta

momentum/gui/rerun/rerun_compat.h

@@ -12,14 +12,19 @@
 #include <string>
 
 // Rerun SDK version compatibility layer
-// This header provides compatibility between rerun 0.23.x and 0.28.x+ APIs.
+// This header provides compatibility between rerun 0.23.x (legacy) and 0.29.x+ (latest) APIs.
+//
+// Minimum supported versions:
+// - rerun-latest: >=0.29.0
+// - rerun-legacy: >=0.23.3,<0.24
 //
 // Key API changes between versions:
 // - 0.24+: Scalar -> Scalars (takes batch of values)
 // - 0.24+: SeriesLine -> SeriesLines
 // - 0.24+: SeriesPoint -> SeriesPoints
 // - 0.26+: set_time_seconds deprecated -> use set_time_duration_secs
 // - 0.28+: Transform3D::with_axis_length removed (use Axes3D archetype instead)
+// - 0.29+: No breaking API changes affecting this codebase
 //
 // The RERUN_VERSION_GE macro is available since rerun 0.18.