fix: Pass snapshot_id as kwarg to RemoveStatisticsUpdate (apache#2694)

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Closes apache#2558 

# Rationale for this change
When removing snapshots with statistics, `RemoveStatisticsUpdate` was
being instantiated with a positional argument, which, as suggested by
@vndv, "violates Pydantic's BaseModel requirement that all fields be
passed as keyword arguments". Shout out to @vndv for catching this 🚀

This caused a `TypeError: BaseModel.__init__() takes 1 positional
argument but 2 were given` when calling
`table.maintenance.expire_snapshots().older_than(...).commit()`.

## Are these changes tested?
Yes, and a new test was added.

Existing tests only tested the `RemoveStatisticsUpdate` directly, but
didnt test the code path through `RemoveSnapshotsUpdate` that triggers
the bug.

Added `test_update_remove_snapshots_with_statistics` to
`test_expire_snapshots.py` to extend coverage for the condition.

## Are there any user-facing changes?
No.
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Author: ForeverAngry

pyiceberg/table/update/__init__.py

@@ -528,7 +528,7 @@ def _(update: RemoveSnapshotsUpdate, base_metadata: TableMetadata, context: _Tab
         if ref.snapshot_id in update.snapshot_ids
     )
     remove_statistics_updates = (
-        RemoveStatisticsUpdate(statistics_file.snapshot_id)
+        RemoveStatisticsUpdate(snapshot_id=statistics_file.snapshot_id)
         for statistics_file in base_metadata.statistics
         if statistics_file.snapshot_id in update.snapshot_ids
     )

tests/table/test_expire_snapshots.py

@@ -23,6 +23,7 @@
 import pytest
 
 from pyiceberg.table import CommitTableResponse, Table
+from pyiceberg.table.update import RemoveSnapshotsUpdate, update_table_metadata
 from pyiceberg.table.update.snapshot import ExpireSnapshots
 
 
@@ -280,3 +281,39 @@ def worker2() -> None:
 
     assert results["expire1_snapshots"] == expected_1, "Worker 1 snapshots contaminated"
     assert results["expire2_snapshots"] == expected_2, "Worker 2 snapshots contaminated"
+
+
+def test_update_remove_snapshots_with_statistics(table_v2_with_statistics: Table) -> None:
+    """
+    Test removing snapshots from a table that has statistics.
+
+    This test exercises the code path where RemoveStatisticsUpdate is instantiated
+    within the RemoveSnapshotsUpdate handler. Before the fix for #2558, this would
+    fail with: TypeError: BaseModel.__init__() takes 1 positional argument but 2 were given
+    """
+    # The table has 2 snapshots with IDs: 3051729675574597004 and 3055729675574597004
+    # Both snapshots have statistics associated with them
+    REMOVE_SNAPSHOT = 3051729675574597004
+    KEEP_SNAPSHOT = 3055729675574597004
+
+    # Verify fixture assumptions
+    assert len(table_v2_with_statistics.metadata.snapshots) == 2
+    assert len(table_v2_with_statistics.metadata.statistics) == 2
+    assert any(stat.snapshot_id == REMOVE_SNAPSHOT for stat in table_v2_with_statistics.metadata.statistics), (
+        "Snapshot to remove should have statistics"
+    )
+
+    # This should trigger RemoveStatisticsUpdate instantiation for the removed snapshot
+    update = RemoveSnapshotsUpdate(snapshot_ids=[REMOVE_SNAPSHOT])
+    new_metadata = update_table_metadata(table_v2_with_statistics.metadata, (update,))
+
+    # Verify the snapshot was removed
+    assert len(new_metadata.snapshots) == 1
+    assert new_metadata.snapshots[0].snapshot_id == KEEP_SNAPSHOT
+
+    # Verify the statistics for the removed snapshot were also removed
+    assert len(new_metadata.statistics) == 1
+    assert new_metadata.statistics[0].snapshot_id == KEEP_SNAPSHOT
+    assert not any(stat.snapshot_id == REMOVE_SNAPSHOT for stat in new_metadata.statistics), (
+        "Statistics for removed snapshot should be gone"
+    )