feat: complete vectorstore adapter parameter name updates

- Update client-side reranking fallback to use descriptive parameter names
- Add backward compatibility for old parameter names in parameter extraction
- Both server-side and client-side recency paths now use descriptive names internally
- Update task memory with completion status

All server-side components now use readable parameter names:
- semantic_weight (vs w_sem)
- recency_weight (vs w_recency)
- freshness_weight (vs wf)
- novelty_weight (vs wa)

Full backward compatibility maintained - all old names still work.
Comprehensive test suite passes: 35+ tests across all affected modules.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: abrookins

agent_memory_server/vectorstore_adapter.py

@@ -593,16 +593,32 @@ async def search_memories(
 
                     now = _dt.now(_UTC)
                     params = {
-                        "w_sem": float(recency_params.get("w_sem", 0.8))
+                        "semantic_weight": float(
+                            recency_params.get(
+                                "semantic_weight", recency_params.get("w_sem", 0.8)
+                            )
+                        )
                         if recency_params
                         else 0.8,
-                        "w_recency": float(recency_params.get("w_recency", 0.2))
+                        "recency_weight": float(
+                            recency_params.get(
+                                "recency_weight", recency_params.get("w_recency", 0.2)
+                            )
+                        )
                         if recency_params
                         else 0.2,
-                        "wf": float(recency_params.get("wf", 0.6))
+                        "freshness_weight": float(
+                            recency_params.get(
+                                "freshness_weight", recency_params.get("wf", 0.6)
+                            )
+                        )
                         if recency_params
                         else 0.6,
-                        "wa": float(recency_params.get("wa", 0.4))
+                        "novelty_weight": float(
+                            recency_params.get(
+                                "novelty_weight", recency_params.get("wa", 0.4)
+                            )
+                        )
                         if recency_params
                         else 0.4,
                         "half_life_last_access_days": float(
@@ -1122,16 +1138,32 @@ def parse_timestamp_to_datetime(timestamp_val):
 
                 now = _dt.now(_UTC)
                 params = {
-                    "w_sem": float(recency_params.get("w_sem", 0.8))
+                    "semantic_weight": float(
+                        recency_params.get(
+                            "semantic_weight", recency_params.get("w_sem", 0.8)
+                        )
+                    )
                     if recency_params
                     else 0.8,
-                    "w_recency": float(recency_params.get("w_recency", 0.2))
+                    "recency_weight": float(
+                        recency_params.get(
+                            "recency_weight", recency_params.get("w_recency", 0.2)
+                        )
+                    )
                     if recency_params
                     else 0.2,
-                    "wf": float(recency_params.get("wf", 0.6))
+                    "freshness_weight": float(
+                        recency_params.get(
+                            "freshness_weight", recency_params.get("wf", 0.6)
+                        )
+                    )
                     if recency_params
                     else 0.6,
-                    "wa": float(recency_params.get("wa", 0.4))
+                    "novelty_weight": float(
+                        recency_params.get(
+                            "novelty_weight", recency_params.get("wa", 0.4)
+                        )
+                    )
                     if recency_params
                     else 0.4,
                     "half_life_last_access_days": float(