Refactor AI Host to Backend Service and update related components

- Renamed references from "AI Host" to "Backend Service" throughout the codebase for consistency.
- Updated the registration and unregistration of context menus to include the Outliner.
- Changed the job protocol versioning and related constants for clarity.
- Modified the runtime installation messages and error handling to reflect the new terminology.
- Adjusted the user interface labels and messages in panels and operators to align with the new Backend Service terminology.
- Updated tests to ensure they reflect the changes in naming and functionality.
- Changed default value for background depth in geometry nodes asset to -1.0 for better handling of depth planes.

tests/test_bootstrap_runtime.py

@@ -689,7 +689,7 @@ class BootstrapRuntimeTest(unittest.TestCase):
                 bootstrap.install(args)
 
             ready = json.loads(
-                (runtime_dir / "snapform_ready.json").read_text(
+                (runtime_dir / "environment_manifest.json").read_text(
                     encoding="utf-8"
                 )
             )
@@ -730,7 +730,9 @@ class BootstrapRuntimeTest(unittest.TestCase):
                 bootstrap.install(args)
 
             self.assertFalse((runtime_dir / "partial-python.exe").exists())
-            self.assertTrue((runtime_dir / "snapform_ready.json").is_file())
+            self.assertTrue(
+                (runtime_dir / "environment_manifest.json").is_file()
+            )
 
     def test_ready_runtime_is_not_cleaned(self):
         bootstrap = load_bootstrap_runtime()
@@ -741,8 +743,14 @@ class BootstrapRuntimeTest(unittest.TestCase):
             self.create_bundled_vendor(root)
             (runtime_dir / "Scripts").mkdir()
             (runtime_dir / "Scripts" / "python.exe").write_text("python")
-            (runtime_dir / "snapform_ready.json").write_text(
-                json.dumps({"runtime_schema": bootstrap.RUNTIME_SCHEMA}),
+            (runtime_dir / "environment_manifest.json").write_text(
+                json.dumps(
+                    {
+                        "environment_manifest_revision": (
+                            bootstrap.ENVIRONMENT_MANIFEST_REVISION
+                        )
+                    }
+                ),
                 encoding="utf-8",
             )
             (runtime_dir / "marker.txt").write_text("keep")
@@ -804,12 +812,14 @@ class BootstrapRuntimeTest(unittest.TestCase):
             ):
                 bootstrap.install(args)
 
-            self.assertTrue((runtime_dir / "snapform_ready.json").is_file())
+            self.assertTrue(
+                (runtime_dir / "environment_manifest.json").is_file()
+            )
             status = json.loads(
                 (root / "status.json").read_text(encoding="utf-8")
             )
             self.assertEqual(status["progress"], 1.0)
-            self.assertIn("Runtime is ready", status["message"])
+            self.assertIn("Backend Environment is ready", status["message"])
             self.assertTrue(
                 any(
                     "PramaLLC/BEN2" in map(str, command)
@@ -1208,7 +1218,10 @@ class BootstrapRuntimeTest(unittest.TestCase):
 
         messages = [call.args[2] for call in mocked_write.call_args_list]
         self.assertTrue(
-            any("Checking Runtime" in message for message in messages)
+            any(
+                "Checking Backend Environment" in message
+                for message in messages
+            )
         )
         self.assertEqual(report, {})