chore(deps): bump starlette from 1.0.0 to 1.2.1 in the production group

Bumps the production group with 1 update: [starlette](https://github.com/Kludex/starlette).


Updates `starlette` from 1.0.0 to 1.2.1
- [Release notes](https://github.com/Kludex/starlette/releases)
- [Changelog](https://github.com/Kludex/starlette/blob/main/docs/release-notes.md)
- [Commits](Kludex/starlette@1.0.0...1.2.1)

---
updated-dependencies:
- dependency-name: starlette
  dependency-version: 1.2.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -18,7 +18,7 @@ classifiers = [
 dependencies = [
     # Core runtime
     "uvicorn>=0.35",
-    "starlette==1.0.0",
+    "starlette==1.2.1",
     "pydantic>=2.11.7",
     "pydantic-settings>=2.14.1,<3",
     "loguru>=0.7.3,<1",
@@ -104,7 +104,7 @@ runtime-boxd = [
 # Minimal core only (use: pip install bindu[core] --only-deps)
 core = [
     "uvicorn>=0.35",
-    "starlette==1.0.0",
+    "starlette==1.2.1",
     "pydantic>=2.11.7",
     "pydantic-settings>=2.14.1,<3",
     "loguru>=0.7.3,<1",