fix: fsspec connectors returning data source version as integer (#2427)

Connector data source versions should always be string values, however
we were using the integer checksum value for the version for fsspec
connectors. This casts that value to a string.

## Changes

* Cast the checksum value to a string when assigning the version value
for fsspec connectors.
* Adds test to validate that these connectors will assign a string value
when an integer checksum is fetched.

## Testing

Unit test added.

Author: ryannikolaidis

Diff for: CHANGELOG.md

@@ -31,6 +31,7 @@
 * **Fix documentation and sample code for Chroma.** Was pointing to wrong examples..
 * **Fix flatten_dict to be able to flatten tuples inside dicts** Update flatten_dict function to support flattening tuples inside dicts. This is necessary for objects like Coordinates, when the object is not written to the disk, therefore not being converted to a list before getting flattened (still being a tuple).
 * **Fix the serialization of the Chroma destination connector.** Presence of the ChromaCollection object breaks serialization due to TypeError: cannot pickle 'module' object. This removes that object before serialization.
+* **Fix fsspec connectors returning version as integer.** Connector data source versions should always be string values, however we were using the integer checksum value for the version for fsspec connectors. This casts that value to a string.
 
 ## 0.12.0
 

Diff for: test_unstructured_ingest/unit/test_fsspec.py

@@ -0,0 +1,25 @@
+from unittest.mock import MagicMock, patch
+
+from fsspec import AbstractFileSystem
+
+from unstructured.ingest.connector.fsspec.fsspec import FsspecIngestDoc, SimpleFsspecConfig
+from unstructured.ingest.interfaces import ProcessorConfig, ReadConfig
+
+
+@patch("fsspec.get_filesystem_class")
+def test_version_is_string(mock_get_filesystem_class):
+    """
+    Test that the version is a string even when the filesystem checksum is an integer.
+    """
+    mock_fs = MagicMock(spec=AbstractFileSystem)
+    mock_fs.checksum.return_value = 1234567890
+    mock_fs.info.return_value = {"etag": ""}
+    mock_get_filesystem_class.return_value = lambda **kwargs: mock_fs
+    config = SimpleFsspecConfig("s3://my-bucket", access_config={})
+    doc = FsspecIngestDoc(
+        processor_config=ProcessorConfig(),
+        read_config=ReadConfig(),
+        connector_config=config,
+        remote_file_path="test.txt",
+    )
+    assert isinstance(doc.source_metadata.version, str)

Diff for: unstructured/ingest/connector/fsspec/fsspec.py

@@ -134,7 +134,7 @@ def update_source_metadata(self):
         self.source_metadata = SourceMetadata(
             date_created=date_created,
             date_modified=date_modified,
-            version=version,
+            version=str(version),
             source_url=f"{self.connector_config.protocol}://{self.remote_file_path}",
             exists=file_exists,
         )