feat(PMEM-WP-0017): federated store management CLI and activity reports

Add phase_memory.management for cross-store discovery and windowed
activity reporting. Extend the phase-memory CLI with stores list and
report commands, plus make report-7d for the default weekly operator view.

tests/fixtures/public-api-snapshot.json

@@ -17,6 +17,7 @@
     "EVALUATION_TREND_REGRESSION_GATE_SCHEMA",
     "EVALUATION_TREND_SCHEMA",
     "ExternalAdapterPack",
+    "FEDERATED_REPORT_SCHEMA",
     "FakeExternalEventLog",
     "FakeExternalGraphStore",
     "FakeExternalPolicyGateway",
@@ -76,6 +77,8 @@
     "RuntimeConfig",
     "SERVICE_APP_SCHEMA",
     "SERVICE_BINDING_SCHEMA",
+    "STORE_LIST_SCHEMA",
+    "STORE_REGISTRY_SCHEMA",
     "ServiceAppConfig",
     "ServiceBinding",
     "ServiceResponse",
@@ -89,8 +92,11 @@
     "activation_quality_report",
     "adapter_pack_manifest",
     "branch_path",
+    "build_federated_report",
     "build_service_binding",
     "build_session_event",
+    "build_store_list",
+    "classify_store",
     "compact_path",
     "create_path",
     "create_wsgi_app",
@@ -99,6 +105,7 @@
     "credentialed_operator_report",
     "credentialed_telemetry_retention_drill",
     "default_memory_store_path",
+    "discover_memory_stores",
     "evaluation_threshold_report",
     "evaluation_trend_artifact",
     "evaluation_trend_history",