Preperation of release 0.13.0 (#709)

* Preperation of release 0.13.0

Added security note update and release notes in the blog.

* Update docs/blog/2025-02-10-release-0-13-0/index.md

Co-authored-by: Copilot <[email protected]>

* removed note about stream and IBufferWriter, that is covered by minimizng allocations

---------

Co-authored-by: Copilot <[email protected]>

Author: Ulimo

SECURITY.md

@@ -6,7 +6,8 @@ These are the versions that will currently be updated with security updates:
 
 | Version | Supported          |
 | ------- | ------------------ |
-| 0.12.x  | :white_check_mark: |
+| 0.13.x  | :white_check_mark: |
+| 0.12.x  | :x:                |
 | 0.11.x  | :x:                |
 | 0.10.x  | :x:                |
 | 0.9.x   | :x:                |

docs/blog/2025-02-10-release-0-13-0/index.md

@@ -0,0 +1,60 @@
+---
+slug: release-0-13-0
+title: Release 0.13.0
+tags: [release]
+---
+
+## Major changes
+
+### New serializer to improve serialization speed
+A new custom serializer has been implemented that follows the Apache Arrow serialization while minimizing extra allocations and memory copies.
+
+Additionally, the default compression method was also changed from using ZLib to Zstd. 
+This change was also made to improve serialization performance.
+
+### Support for pause & resume
+
+A new feature has been added to allow pausing and resuming data streams, making it easier to conduct maintenance or temporarily halt processing without losing state.
+
+For more information, visit https://koralium.github.io/flowtide/docs/deployment/pauseresume.
+
+### Integer column changed from 64 bits to dynamic size
+
+The integer column was changed to now instead select the bit size based on the data inside of the column.
+This change reduces memory usage for columns with smaller integer values. Bit size is determined on a per-page basis, so pages with larger values will only use higher bit sizes when necessary.
+
+### Delta Lake Support
+
+This version adds support to both read and write to the Delta Lake format. This allows easy integration
+to data lake storage. To learn more about delta lake support, please visit: https://koralium.github.io/flowtide/docs/connectors/deltalake
+
+### Custom data source & sink changed to use column based events
+
+Both the custom data source and sink have now been changed to use column based events.
+This improves connector performance by eliminating the need to convert data between column-based and row-based formats during streaming.
+
+## Minor changes
+
+### Elasticsearch connector change from Nest to Elastic.Clients.Elasticsearch
+
+The Elasticsearch connector has been updated from the deprecated `Nest` package to `Elastic.Clients.Elasticsearch`. This change requires stream configurations to be adjusted for the new connection settings.
+
+Additionally, connection settings are now provided via a function, enabling dynamic credential management, such as rolling passwords.
+
+### Add support for custom stream listeners
+
+Applications can now listen to stream events like checkpoints, state changes, and failures, allowing for custom exit strategies or monitoring logic.
+
+
+Example:
+
+```csharp
+.AddCustomOptions(s =>
+{
+    s.WithExitProcessOnFailure();
+});
+```
+
+### Cache lookup table for state clients
+
+An internal optimization adds a small lookup table for state client page access, reducing contention on the global LRU cache. This change has shown a 10–12% performance improvement in benchmarks.