Pathway

Fixed
- Switched `pw.xpacks.llm.embedders.GeminiEmbedder` to be sync to resolve compatibility issues with the Google Colab runs.
- Pinned `surya-ocr` module version for stability.

Added
- `pw.xpacks.llm.embedders.GeminiEmbedder` which is a wrapper for Google Gemini Embedding services.

Fixed
- `pw.debug.table_to_pandas` now exports `int | None` columns correctly.

Changed
- `pw.io.airbyte.read` can now be used with Airbyte connectors implemented in Python without requiring Docker.
- **BREAKING**: UDFs now verify the type of returned values at runtime. If it is possible to cast a returned value to a proper type, the values is cast. If the value does not match the expected type and can't be cast, an error is raised.
- **BREAKING**: `pw.reducers.ndarray` reducer requires input column to either have type `float`, `int` or `Array`.
- `pw.xpacks.llm.parsers.OpenParse` can now extract and parse images & diagrams from PDFs. This can be enabled by setting the `parse_images`. `processing_pipeline` can be also set to customize the post processing of doc elements.

Added
- `pw.io.deltalake.read` now supports S3 data sources.
- `pw.xpacks.llm.parsers.ImageParser` which allows parsing images with the vision LMs.
- `pw.xpacks.llm.parsers.SlideParser` that enables parsing PDF and PPTX slides with the vision LMs.
- `pw.xpacks.llm.parsers.question_answering.RAGClient`, Python client for Pathway hosted RAG apps.
- `pw.xpacks.llm.parsers.question_answeringDeckRetriever`, a RAG app that enables searching through slide decks with visual-heavy elements.

Fixed
- `pw.xpacks.llm.vector_store.VectorStoreServer` now uses new indexes.

Changed
- `pw.xpacks.llm.parsers.OpenParse` now supports any vision Language model including local and proprietary models via LiteLLM.

Added
- `pw.io.kafka.read` now accepts an autogenerate_key flag. This flag determines the primary key generation policy to apply when reading raw data from the source. You can either use the key from the Kafka message or have Pathway autogenerate one.
- `pw.io.deltalake.read` input connector that fetches changes from DeltaLake into a Pathway table.
- `pw.xpacks.llm.parsers.OpenParse` which allows parsing tables and images in PDFs.

Fixed
- All S3 input connectors (including S3, Min.io, Digital Ocean, and Wasabi) now automatically retry network operations if a failure occurs.
- The issue where the connection to the S3 source fails after partially ingesting an object has been resolved by downloading the object in full first.

Added
- `pw.io.deltalake.write` now supports S3 destinations.

Changed
- `pw.debug.compute_and_print` now allows passing more than one table.
- **BREAKING**: `path` parameter in `pw.io.deltalake.write` renamed to `uri`.

Fixed
- A bug in `pw.Table.deduplicate`. If `persistent_id` is not set, it is no longer generated in `pw.PersistenceMode.SELECTIVE_PERSISTING` mode.