v0.4.19

## What's Changed
* doc: add 0.4.18 release blog post by @nicoloboschi in https://github.com/vectorize-io/hindsight/pull/567
* fix: support for gemini-3.1-flash-lite-preview (thought_signature in tool calls) by @nicoloboschi in https://github.com/vectorize-io/hindsight/pull/568
* docs: improve type hints and documentation in client_wrapper by @hiSandog in https://github.com/vectorize-io/hindsight/pull/570
* fix: inject Accept header in MCP middleware to prevent 406 errors by @DK09876 in https://github.com/vectorize-io/hindsight/pull/571
* blog: add disposition-aware agents post by @benfrank241 in https://github.com/vectorize-io/hindsight/pull/566
* Upgrade GitHub Actions to latest versions by @salmanmkc in https://github.com/vectorize-io/hindsight/pull/576
* chore(deps): bump actions/setup-python from 5 to 6 by @dependabot[bot] in https://github.com/vectorize-io/hindsight/pull/583
* chore(deps): bump actions/download-artifact from 4 to 8 by @dependabot[bot] in https://github.com/vectorize-io/hindsight/pull/582
* chore(deps): bump actions/checkout from 4 to 6 by @dependabot[bot] in https://github.com/vectorize-io/hindsight/pull/581
* fix: chunk FK cascade so doc deletion doesn't leave orphan memory units by @jnMetaCode in https://github.com/vectorize-io/hindsight/pull/580
* fix(migration): backsweep orphaned observation memory units by @nicoloboschi in https://github.com/vectorize-io/hindsight/pull/584
* feat: local reranker FP16, bucket batching, and transformers 5.x compatibility by @fabioscarsi in https://github.com/vectorize-io/hindsight/pull/588
* fix(docker): honor HINDSIGHT_CP_HOSTNAME for control-plane startup by @abix5 in https://github.com/vectorize-io/hindsight/pull/590
* docs: add config vars for local reranker FP16 and bucket batching by @nicoloboschi in https://github.com/vectorize-io/hindsight/pull/589
* docs(skills): encourage rich context over pre-summarized strings in retain by @nicoloboschi in https://github.com/vectorize-io/hindsight/pull/594
* blog: add n8n persistent memory workflows post by @benfrank241 in https://github.com/vectorize-io/hindsight/pull/585
* docs: add Best Practices unversioned page by @nicoloboschi in https://github.com/vectorize-io/hindsight/pull/598
* feat: hindsight-hermes integration for Hermes Agent by @benfrank241 in https://github.com/vectorize-io/hindsight/pull/600
* feat(retain): verbatim, chunks modes and named retain strategies by @nicoloboschi in https://github.com/vectorize-io/hindsight/pull/593
* blog: Streamlit chatbot with persistent memory by @benfrank241 in https://github.com/vectorize-io/hindsight/pull/602
* fix: prevent silent memory loss on consolidation LLM failure by @nicoloboschi in https://github.com/vectorize-io/hindsight/pull/601
* blog: fix streamlit post slug and add cover image by @benfrank241 in https://github.com/vectorize-io/hindsight/pull/604
* blog: fix internal links in streamlit post by @benfrank241 in https://github.com/vectorize-io/hindsight/pull/605
* feat: add Agno integration with Hindsight memory toolkit by @benfrank241 in https://github.com/vectorize-io/hindsight/pull/596
* feat(typescript-client): Deno compatibility by @nicoloboschi in https://github.com/vectorize-io/hindsight/pull/607

## New Contributors
* @hiSandog made their first contribution in https://github.com/vectorize-io/hindsight/pull/570
* @jnMetaCode made their first contribution in https://github.com/vectorize-io/hindsight/pull/580

**Full Changelog**: https://github.com/vectorize-io/hindsight/compare/v0.4.18...v0.4.19