community[patch]: Implement Unique ID Enforcement in FAISS (#17244)

**Description:**
Implemented unique ID validation in the FAISS component to ensure all
document IDs are distinct. This update resolves issues related to
non-unique IDs, such as inconsistent behavior during deletion processes.

libs/community/tests/unit_tests/vectorstores/test_faiss.py

@@ -774,3 +774,15 @@ async def test_async_delete() -> None:
     result = await docsearch.asimilarity_search("bar", k=2)
     assert sorted([d.page_content for d in result]) == ["baz", "foo"]
     assert docsearch.index_to_docstore_id == {0: ids[0], 1: ids[2]}
+
+
+@pytest.mark.requires("faiss")
+def test_faiss_with_duplicate_ids() -> None:
+    """Test whether FAISS raises an exception for duplicate ids."""
+    texts = ["foo", "bar", "baz"]
+    duplicate_ids = ["id1", "id1", "id2"]
+
+    with pytest.raises(ValueError) as exc_info:
+        FAISS.from_texts(texts, FakeEmbeddings(), ids=duplicate_ids)
+
+    assert "Duplicate ids found in the ids list." in str(exc_info.value)