Fix: exclude computed display-name columns from sql_columns/odata_select

Columns with AttributeOf set are auto-generated display names
(e.g. createdbyname, createdbyyominame) that cause errors in OData
\ and are not real data columns. Now filtered out.

Also: _list_table_relationships docstring updated for ManyToOne.
756 unit tests passing.

Author: Saurabh Badenkal

src/PowerPlatform/Dataverse/operations/query.py

@@ -193,7 +193,15 @@ def sql_columns(
 
         raw = self._client.tables.list_columns(
             table,
-            select=["LogicalName", "SchemaName", "AttributeType", "IsPrimaryId", "IsPrimaryName", "DisplayName"],
+            select=[
+                "LogicalName",
+                "SchemaName",
+                "AttributeType",
+                "IsPrimaryId",
+                "IsPrimaryName",
+                "DisplayName",
+                "AttributeOf",
+            ],
             filter="AttributeType ne 'Virtual'",
         )
         result: List[Dict[str, Any]] = []
@@ -203,6 +211,10 @@ def sql_columns(
                 continue
             if not include_system and any(name.endswith(s) for s in _SYSTEM_SUFFIXES):
                 continue
+            # Skip computed display-name columns (AttributeOf is set, meaning
+            # they are auto-generated from a lookup column)
+            if c.get("AttributeOf"):
+                continue
             # Extract display label
             label = ""
             dn = c.get("DisplayName")