build(deps): bump the backend-minor-patch group in /api with 3 updates

Bumps the backend-minor-patch group in /api with 3 updates: [fastapi](https://github.com/fastapi/fastapi), [openai](https://github.com/openai/openai-python) and [boto3](https://github.com/boto/boto3).


Updates `fastapi` from 0.139.2 to 0.140.0
- [Release notes](https://github.com/fastapi/fastapi/releases)
- [Commits](fastapi/fastapi@0.139.2...0.140.0)

Updates `openai` from 2.47.0 to 2.48.0
- [Release notes](https://github.com/openai/openai-python/releases)
- [Changelog](https://github.com/openai/openai-python/blob/main/CHANGELOG.md)
- [Commits](openai/openai-python@v2.47.0...v2.48.0)

Updates `boto3` from 1.43.54 to 1.43.56
- [Release notes](https://github.com/boto/boto3/releases)
- [Commits](boto/boto3@1.43.54...1.43.56)

---
updated-dependencies:
- dependency-name: fastapi
  dependency-version: 0.140.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: backend-minor-patch
- dependency-name: openai
  dependency-version: 2.48.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: backend-minor-patch
- dependency-name: boto3
  dependency-version: 1.43.56
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: backend-minor-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

api/poetry.lock

@@ -19,7 +19,7 @@ python = "^3.11"
 # project was otherwise stuck on (see api/pyproject.toml's implicit pull via
 # fastapi's own dependency bound) only gets fully patched by Starlette
 # 1.3.1+, which no fastapi <0.120 release accepts.
-fastapi = ">=0.119.0"
+fastapi = ">=0.140.0"
 uvicorn = { extras = ["standard"], version = ">=0.21.1" }
 # Engraphis's embedded dashboard mounts routes with Form/UploadFile params;
 # FastAPI refuses to build those without python-multipart (verified live --
@@ -45,10 +45,10 @@ httpx = ">=0.27.0"
 cryptography = ">=46.0.3"
 jinja2 = ">=3.1.6"
 python-dotenv = ">=1.2.2"
-openai = ">=1.76.2"
+openai = ">=2.48.0"
 ollama = ">=0.4.8"
 aiohttp = ">=3.13.3"
-boto3 = ">=1.34.0"
+boto3 = ">=1.43.56"
 websockets = ">=11.0.3"
 azure-identity = ">=1.12.0"
 azure-core = ">=1.38.0"