Add Markitect bridge and activation quality

tests/fixtures/activation-quality-report.json

@@ -0,0 +1,16 @@
+{
+  "explanation_coverage": 1.0,
+  "omitted_required_nodes": [
+    "artifact.profile"
+  ],
+  "policy_denied_required_nodes": [
+    "artifact.profile"
+  ],
+  "provenance_coverage": 0.0,
+  "selected_expected_nodes": [
+    "decision.boundary"
+  ],
+  "source_span_coverage": 1.0,
+  "stale_item_activation_count": 0,
+  "token_budget_utilization": 0.45
+}

tests/fixtures/markitect-invalid-graph.json

@@ -0,0 +1,18 @@
+{
+  "schema_version": "markitect.memory.graph.v1",
+  "id": "invalid-graph",
+  "nodes": [
+    {
+      "id": "node.a",
+      "kind": "decision"
+    }
+  ],
+  "edges": [
+    {
+      "id": "edge.bad",
+      "kind": "depends_on",
+      "source": "node.a",
+      "target": "missing"
+    }
+  ]
+}

tests/fixtures/markitect-invalid-profile.json

@@ -0,0 +1,4 @@
+{
+  "schema_version": "markitect.memory.profile.v99",
+  "title": "Invalid Profile Without Id"
+}

tests/fixtures/markitect-package-response.json

@@ -0,0 +1,8 @@
+{
+  "package_id": "package:activation-fixture",
+  "diagnostics": [],
+  "item_count": 2,
+  "metadata": {
+    "compiled_by": "markitect-fixture"
+  }
+}

tests/fixtures/runtime-activation-plan-snapshot.json

@@ -5,7 +5,7 @@
       "event.restart:max_tokens",
       "risk.durable-write:max_tokens"
     ],
-    "package_request_id": "package-request:854b8a9e0f9a",
+    "package_request_id": "markitect-package-request:60c0ec4c172b",
     "plan_id": "activation:6e0ba40234cd",
     "selected_event_ids": [
       "event.activation"
@@ -19,7 +19,7 @@
     "activation_omitted_items"
   ],
   "operation": "graph.activation.plan",
-  "operation_id": "op:826d3b06fa5b",
+  "operation_id": "op:85705b61958d",
   "schema_version": "phase_memory.runtime.envelope.v1",
   "subject": {
     "id": "phase-memory-fixture-graph",