chore(deps): final upgrade pass (setuptools 84)

`uv lock --upgrade` after the major bumps; every direct dependency is now at
its latest release.

What stays behind is capped upstream, not by this project. The notable one:
huggingface-hub sits at 1.16.1 rather than 1.31.0 because 1.31 wants
click>=8.4.2 and gTTS 2.5.4 — the newest gTTS — caps click below 8.2.
marshmallow is held at 3.x by dataclasses-json, websockets by google-genai,
typer and semchunk by docling-core, portalocker by qdrant-client, and
pydantic-core is pinned exactly by pydantic.

Verified beyond the suite: `docsgpt verify-offline` passes (tiktoken
encoding, both tokenizers, both embedding models, docling PDF conversion),
and the wheel builds and installs into a clean environment resolved from the
declared ranges rather than the lock, with the ASGI app importing there.

docsgpt/requirements-docling.txt

@@ -914,7 +914,7 @@ secretstorage==3.5.0 ; sys_platform == 'linux'
     # via keyring
 semchunk==3.2.5
     # via docling-core
-setuptools==81.0.0
+setuptools==84.0.0
     # via torch
 shapely==2.1.2
     # via rapidocr

uv.lock

@@ -5882,11 +5882,11 @@ wheels = [
 
 [[package]]
 name = "setuptools"
-version = "81.0.0"
+version = "84.0.0"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/0d/1c/73e719955c59b8e424d015ab450f51c0af856ae46ea2da83eba51cc88de1/setuptools-81.0.0.tar.gz", hash = "sha256:487b53915f52501f0a79ccfd0c02c165ffe06631443a886740b91af4b7a5845a", size = 1198299, upload-time = "2026-02-06T21:10:39.601Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/6d/44/f5da03a8ef95d369145c5bb53050e7877c9f3d312e128605fd9504829143/setuptools-84.0.0.tar.gz", hash = "sha256:f4695c21257f0d9b537ec2692c941d02ee143b7cc1276941349a546573b2ef73", size = 1168449, upload-time = "2026-08-08T18:27:58.365Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/e1/e3/c164c88b2e5ce7b24d667b9bd83589cf4f3520d97cad01534cd3c4f55fdb/setuptools-81.0.0-py3-none-any.whl", hash = "sha256:fdd925d5c5d9f62e4b74b30d6dd7828ce236fd6ed998a08d81de62ce5a6310d6", size = 1062021, upload-time = "2026-02-06T21:10:37.175Z" },
+    { url = "https://files.pythonhosted.org/packages/95/9c/c510029fc6ef33a6275cd2c5d3cecd6613dfd6aa401d57c54f1c18852ccf/setuptools-84.0.0-py3-none-any.whl", hash = "sha256:51a52592b3b99e102b609654876bd65f19f999935166d1352678931132b0c670", size = 818216, upload-time = "2026-08-08T18:27:56.719Z" },
 ]
 
 [[package]]