fix: preserve adaptive IVF probe defaults (#4168)

Keep IVF probe fields unset by default so Lance supplies adaptive
behavior. Preserve `nprobes`, `minimum_nprobes`, and `maximum_nprobes`
independently through Rust, Python, namespace, and remote request
construction, with compatibility fields serialized only when explicitly
configured.

The final Rust namespace and LSM propagation update depends on the Lance
release containing lance-format/lance#9184.

python/python/tests/test_remote_db.py

@@ -2164,9 +2164,6 @@ def test_query_sync_minimal():
             "ef": None,
             "vector": [1.0, 2.0, 3.0],
             "vector_column": "vector",
-            "nprobes": 20,
-            "minimum_nprobes": 20,
-            "maximum_nprobes": 20,
             "version": None,
         }
 
@@ -2338,8 +2335,6 @@ def test_query_sync_maximal():
             "refine_factor": 10,
             "vector": [1.0, 2.0, 3.0],
             "nprobes": 5,
-            "minimum_nprobes": 5,
-            "maximum_nprobes": 5,
             "lower_bound": None,
             "upper_bound": None,
             "ef": None,
@@ -2435,7 +2430,7 @@ async def test_query_async_nprobes_zero(hybrid):
     assert requests == ["/v1/table/test/describe/"]
 
 
-def test_query_sync_nprobes():
+def test_query_sync_probe_bounds():
     def handler(body):
         assert body == {
             "k": 10,
@@ -2447,7 +2442,6 @@ def test_query_sync_nprobes():
             "upper_bound": None,
             "ef": None,
             "vector": [1.0, 2.0, 3.0],
-            "nprobes": 5,
             "minimum_nprobes": 5,
             "maximum_nprobes": 15,
             "version": None,
@@ -2464,7 +2458,28 @@ def test_query_sync_nprobes():
         )
 
 
-def test_query_sync_no_max_nprobes():
+def test_query_sync_nprobes_passthrough():
+    def handler(body):
+        assert body["nprobes"] == 20
+        assert "minimum_nprobes" not in body
+        assert "maximum_nprobes" not in body
+        return pa.table({"id": [1]})
+
+    with query_test_table(handler) as table:
+        table.search([1, 2, 3]).nprobes(20).to_list()
+
+
+def test_query_sync_nprobes_with_unbounded_maximum():
+    def handler(body):
+        assert body["nprobes"] == 20
+        assert body["maximum_nprobes"] == 0
+        return pa.table({"id": [1]})
+
+    with query_test_table(handler) as table:
+        table.search([1, 2, 3]).nprobes(20).maximum_nprobes(0).to_list()
+
+
+def test_query_sync_minimum_nprobes_only():
     def handler(body):
         assert body == {
             "k": 10,
@@ -2476,9 +2491,7 @@ def test_query_sync_no_max_nprobes():
             "upper_bound": None,
             "ef": None,
             "vector": [1.0, 2.0, 3.0],
-            "nprobes": 5,
             "minimum_nprobes": 5,
-            "maximum_nprobes": 0,
             "version": None,
         }
 
@@ -2488,7 +2501,6 @@ def test_query_sync_no_max_nprobes():
         (
             table.search([1, 2, 3], vector_column_name="vector2", fast_search=True)
             .minimum_nprobes(5)
-            .maximum_nprobes(0)
             .to_list()
         )
 
@@ -2643,9 +2655,6 @@ def test_query_sync_hybrid():
                 "refine_factor": None,
                 "vector": [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0],
                 "vector_column": "vector",
-                "nprobes": 20,
-                "minimum_nprobes": 20,
-                "maximum_nprobes": 20,
                 "lower_bound": None,
                 "upper_bound": None,
                 "ef": None,