feat(impression): expose entity identity updates

Add core-owned APIs for renaming canonical subjects and adding aliases so updater logic can request identity changes without bypassing indexes.

Synchronize bound active entity subjects after renames and keep capability test stubs aligned.

Partner-Core/src/main/java/work/slhaf/partner/core/cognition/CognitionCapability.java

@@ -57,6 +57,16 @@ public interface CognitionCapability {
      */
     boolean bindActiveEntity(String runtimeId, String entityUuid);
 
+    /**
+     * Rename the canonical subject of a known entity and refresh entity/active-entity indexes.
+     */
+    boolean renameEntitySubject(String entityUuid, String newSubject);
+
+    /**
+     * Add an alias or mention form for a known entity and refresh entity indexes.
+     */
+    boolean addEntityAlias(String entityUuid, String alias, boolean deprecated);
+
     /**
      * Add or replace an impression on a known entity and refresh all entity indexes.
      */

Partner-Core/src/main/java/work/slhaf/partner/core/cognition/impression/ImpressionCore.java

@@ -153,6 +153,45 @@ public class ImpressionCore implements StateSerializable {
         return true;
     }
 
+    /**
+     * Rename the canonical subject of a known entity and keep its previous subject as a historical alias.
+     */
+    @CapabilityMethod
+    public boolean renameEntitySubject(String entityUuid, String newSubject) {
+        Entity entity = knownEntitiesByUuid.get(entityUuid);
+        if (entity == null || newSubject == null || newSubject.isBlank()) {
+            return false;
+        }
+
+        boolean renamed = entity.renameSubject(newSubject.trim());
+        if (!renamed) {
+            return false;
+        }
+
+        refreshKnownEntityIndexes(entity);
+        syncBoundActiveEntitySubjects(entity);
+        return true;
+    }
+
+    /**
+     * Add an alias or mention form for a known entity and refresh search indexes.
+     */
+    @CapabilityMethod
+    public boolean addEntityAlias(String entityUuid, String alias, boolean deprecated) {
+        Entity entity = knownEntitiesByUuid.get(entityUuid);
+        if (entity == null || alias == null || alias.isBlank()) {
+            return false;
+        }
+
+        boolean added = entity.addAlias(alias.trim(), deprecated);
+        if (!added) {
+            return false;
+        }
+
+        refreshKnownEntityIndexes(entity);
+        return true;
+    }
+
     /**
      * Update a known entity impression through the core so text/vector indexes stay consistent.
      * newImpression can be null or blank to update the existing impression in place.
@@ -355,6 +394,20 @@ public class ImpressionCore implements StateSerializable {
         refreshKnownEntityTextSearch(entity);
     }
 
+    private void syncBoundActiveEntitySubjects(Entity entity) {
+        List<ActiveEntity> boundEntities;
+        synchronized (activeEntities) {
+            boundEntities = activeEntities.stream()
+                    .filter(activeEntity -> entity.getUuid().equals(activeEntity.getBoundEntityUuid()))
+                    .toList();
+        }
+
+        boundEntities.forEach(activeEntity -> {
+            activeEntity.updateSubject(entity.getSubject());
+            refreshActiveEntityTextSearch(activeEntity);
+        });
+    }
+
     /**
      * Replace text-search documents for one known entity.
      */

Partner-Core/src/test/java/work/slhaf/partner/module/communication/CommunicationProducerTest.java

@@ -174,6 +174,16 @@ class CommunicationProducerTest {
             return false;
         }
 
+        @Override
+        public boolean renameEntitySubject(String entityUuid, String newSubject) {
+            return false;
+        }
+
+        @Override
+        public boolean addEntityAlias(String entityUuid, String alias, boolean deprecated) {
+            return false;
+        }
+
         @Override
         public boolean updateEntityImpression(String entityUuid, String impression, String newImpression, double confidence) {
             return false;

Partner-Core/src/test/java/work/slhaf/partner/module/memory/runtime/MemoryRuntimeTest.java

@@ -127,6 +127,16 @@ class MemoryRuntimeTest {
                 return false;
             }
 
+            @Override
+            public boolean renameEntitySubject(String entityUuid, String newSubject) {
+                return false;
+            }
+
+            @Override
+            public boolean addEntityAlias(String entityUuid, String alias, boolean deprecated) {
+                return false;
+            }
+
             @Override
             public boolean updateEntityImpression(String entityUuid, String impression, String newImpression, double confidence) {
                 return false;