Bump rpds-py from 0.30.0 to 2026.5.1 (#423)

* Bump rpds-py from 0.30.0 to 2026.5.1

Bumps [rpds-py](https://github.com/crate-py/rpds) from 0.30.0 to 2026.5.1.
- [Release notes](https://github.com/crate-py/rpds/releases)
- [Changelog](https://github.com/crate-py/rpds/blob/main/release.toml)
- [Commits](crate-py/rpds@v0.30.0...v2026.5.1)

---
updated-dependencies:
- dependency-name: rpds-py
  dependency-version: 2026.5.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

* Align Pipenv rpds-py version with requirements

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

Author: dependabot[bot]

backend/Pipfile

@@ -53,7 +53,7 @@ rcssmin = "==1.2.1"
 referencing = "==0.37.0"
 requests = "==2.34.2"
 rjsmin = "==1.2.4"
-rpds-py = "==0.30.0"
+rpds-py = "==2026.5.1"
 sqlparse = "==0.5.5"
 tomlkit = "==0.15.0"
 typing-extensions = "==4.15.0"