feat: uv migration (#3493)

* uv migration

smaller runners, freeze test runs, remove dev, ruff,hatchling, previw,
poetry, generates wheel, installs wheel, docker

* fix tests and dependency groups

* test fixes

* test fixing and main

* resolve merge conflict

* dev + test dependency group

* Test

* trigger CI

* trigger CI

* add debugging info

* trigger CI

* uv for reusable and sdk preview

* resolve mc and reformat black

* staged-api

* mypy

* fix fern

* prod Dockerfile

* model sweep, and project.toml and uvlock

* --group test -> --extra dev

* remove redundant --extra dev and rename tests to dev

* sdk backwards compat install sqlite

* install sqlite group for sdk-backwards-compat

* install uv on gh runner for cloud-api-integration-tests

* stage+publish

* pytest asyncio

* bug causing pytest package to get removed

* try to fix async event loop issues

* migrate to --with google-cloud-secret-manager

---------

Co-authored-by: Kian Jones <kian@letta.com>

README.md

@@ -120,7 +120,7 @@ If your Letta server isn't running on `localhost` (for example, you deployed it
 
 > _"Do I need to install Docker to use Letta?"_
 
-No, you can install Letta using `pip` (via `pip install -U letta`), as well as from source (via `poetry install`). See instructions below.
+No, you can install Letta using `pip` (via `pip install -U letta`), as well as from source (via `uv sync`). See instructions below.
 
 > _"What's the difference between installing with `pip` vs `Docker`?"_