fix: wire compact_semantic_duplicates setting to env var

the compact_semantic_duplicates parameter in compact_long_term_memories()
was hardcoded to True with no corresponding Settings field. setting
COMPACT_SEMANTIC_DUPLICATES=false as an env var had no effect because
pydantic-settings never read it. add the field to Settings so the
docket perpetual scheduler respects the env var.

Author: Piotr1215

agent_memory_server/config.py

@@ -489,6 +489,7 @@ class Settings(BaseSettings):
 
     # Compaction settings
     compaction_every_minutes: int = 10
+    compact_semantic_duplicates: bool = True
 
     # Docket task timeout for LLM-dependent tasks (in minutes)
     # This controls how long tasks like memory compaction, extraction, and summarization

agent_memory_server/long_term_memory.py

@@ -638,7 +638,7 @@ async def compact_long_term_memories(
     redis_client: Redis | None = None,
     vector_distance_threshold: float = 0.2,
     compact_hash_duplicates: bool = True,
-    compact_semantic_duplicates: bool = True,
+    compact_semantic_duplicates: bool = settings.compact_semantic_duplicates,
     perpetual: Perpetual = Perpetual(
         every=timedelta(minutes=settings.compaction_every_minutes), automatic=True
     ),