🔧 chore: Improve Document Loader and Vector Store Logging

[danny-avila]

Summary

I improved temporary file cleanup reliability in the document loader and enhanced logging clarity for vector store operations.

• Fixed cleanup_temp_encoding_file to verify _temp_filepath is not None before attempting file removal
• Added _sanitize_parameters_for_logging static method to ExtendedPgVector for truncating embeddings and large values in logs
• Updated query logging to utilize sanitization, preventing verbose embedding vectors from cluttering log output
• Maintained proper handling of various parameter types including dictionaries, lists, tuples, and nested structures

Change Type

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Testing

Test the changes by:

1. Loading documents with various encodings to verify temporary file cleanup works correctly
2. Enabling DEBUG_PGVECTOR_QUERIES environment variable and performing vector store operations
3. Checking logs to confirm embedding vectors are properly truncated while preserving useful debugging information

Test Configuration:

• Set DEBUG_PGVECTOR_QUERIES=true for vector store logging tests
• Test with CSV files containing non-UTF-8 encodings
• Verify with documents that trigger temporary file creation

Checklist

• My code adheres to this project's style guidelines
• I have performed a self-review of my own code
• I have commented in any complex areas of my code
• My changes do not introduce new warnings