fix(memory): widen query-time context candidates

src/atocore/memory/service.py

@@ -50,6 +50,9 @@ MEMORY_STATUSES = [
     "graduated",  # Phase 5: memory has become an entity; content frozen, forward pointer in properties
 ]
 
+DEFAULT_CONTEXT_MEMORY_LIMIT = 30
+QUERY_CONTEXT_MEMORY_LIMIT = 120
+
 
 @dataclass
 class Memory:
@@ -909,12 +912,13 @@ def get_memories_for_context(
     # ``_rank_memories_for_query`` via Python's stable sort.
     pool: list[Memory] = []
     seen_ids: set[str] = set()
+    candidate_limit = QUERY_CONTEXT_MEMORY_LIMIT if query_tokens is not None else DEFAULT_CONTEXT_MEMORY_LIMIT
     for mtype in memory_types:
         for mem in get_memories(
             memory_type=mtype,
             project=project,
             min_confidence=0.5,
-            limit=30,
+            limit=candidate_limit,
         ):
             if mem.id in seen_ids:
                 continue