Added comprehensive ASV (Airspeed Velocity) benchmarks for the domain layer,
measuring performance of:
- DomainBaseModel validation and serialization
- Context model operations
- Change and ChangeSet operations
- Plan model creation and serialization
- Project model operations
- High-volume domain model validation throughput

Benchmarks cover instantiation, serialization (model_dump and JSON), and
throughput testing with 100+ instances to identify performance regressions.

ISSUES CLOSED: #1925

@@ -0,0 +50,4 @@
+    """Benchmark DomainBaseModel validation and instantiation."""
+
+    timeout = 60
+

@@ -0,0 +83,4 @@
+        model = self.TestModel(**self.test_data)
+        model.model_dump()
+
+    def time_model_dump_json(self) -> None:

@@ -0,0 +109,4 @@
+        }
+
+    def time_create_context(self) -> None:
+        """Benchmark Context instantiation."""

@@ -0,0 +16,4 @@
+    sys.path.insert(0, _SRC)
+
+import cleveragents  # noqa: E402
+

@@ -0,0 +17,4 @@
+
+import cleveragents  # noqa: E402
+
+import random  # noqa: E402

@@ -0,0 +39,4 @@
+    PlanDecisionContextStrategy,
+    SemanticEmbeddingStrategy,
+    SimpleKeywordStrategy,
+    TemporalArchaeologyStrategy,

@@ -0,0 +1,417 @@
+"""ASV benchmarks for domain layer models and operations.

@@ -0,0 +23,4 @@
+
+from cleveragents.domain.models.acms import (  # noqa: E402
+    BackendSet,
+    ScopedBackendView,