Publish finalized MessyKitchens cameras for all 1503 views

Add a clean camera file with view identifiers, native image sizes, intrinsics, and camera-to-world transforms.
Document coordinate conventions and retain full numeric precision.

evaluation/messykitchen/README.md

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+# MessyKitchens cameras
+
+[cameras.json](cameras.json) contains the final fitted cameras for all 1,503 prepared views.
+The schema is `partprobe3d.messykitchens.cameras.v1`.
+The `views` dictionary uses the same view keys as the prepared dataset manifest.
+
+| Field | Meaning |
+| --- | --- |
+| `scene` | Original scene identifier |
+| `source_view` | Original photograph identifier |
+| `native_size` | Image width and height in pixels, in that order |
+| `projection_intrinsics` | The 3 × 3 intrinsic matrix for the native image |
+| `camera_to_world` | The 4 × 4 rigid transform from camera coordinates to world coordinates |
+
+World coordinates match the prepared GT meshes in meters.
+Camera axes point right, down, and forward for positive x, y, and z.
+Native pixel centers use integer coordinates, starting at `(0, 0)`.
+The intrinsic matrix uses these native pixel coordinates.
+
+For column vectors, `camera_to_world` maps `[x, y, z, 1]` from the camera frame to the world frame.
+Its inverse provides the world-to-camera transform.
+The top-left 3 × 3 block contains rotation.
+The final column contains translation in meters.
+
+These cameras result from GT-assisted silhouette fitting and constitute estimated calibration.
+All views passed local convergence and native overlap plateau checks.
+The file preserves the final numeric values without rounding.
+Fit diagnostics, candidate cameras, and optimizer records remain outside this clean export.
+
+This file supplements the existing evaluation archives.
+Their per-view registration records retain the earlier camera estimates.