Post-release cleanup: drop grpcio pin, add PyPI badges (#11)

- Remove the temporary grpcio<1.82 e2e pin: grpcio-health-checking 1.82.0 was
  yanked upstream (bad protobuf dependency), so a fresh unpinned install now
  resolves to the working 1.81.1. Closes #9.
- README: add PyPI version + Python-versions badges now the package is published.

Author: faizollah

.github/workflows/realapps.yml

@@ -55,13 +55,6 @@ jobs:
           printf '\n[tool.flwrcrate.metric-uris]\naccuracy = "https://schema.org/Accuracy"\n' >> /tmp/flcrate_pyproject.toml
           pip install -e "$APP"
 
-      # TEMPORARY WORKAROUND (see #9): grpcio 1.82.0 (2026-07-06) breaks
-      # `flower-superlink` startup, and the unpinned installs above pull it in
-      # via flwr. Pin to the last known-good grpcio until Flower/grpcio fix it.
-      # Remove this step once #9 is resolved.
-      - name: Pin grpcio (flower-superlink startup regression workaround)
-        run: pip install "grpcio<1.82" "grpcio-health-checking<1.82"
-
       - name: Run the federation
         working-directory: ${{ runner.temp }}/${{ matrix.app }}
         run: |

README.md

@@ -1,5 +1,7 @@
 # flwrCrate
 
+[![PyPI](https://img.shields.io/pypi/v/flwrcrate)](https://pypi.org/project/flwrcrate/)
+[![Python versions](https://img.shields.io/pypi/pyversions/flwrcrate)](https://pypi.org/project/flwrcrate/)
 [![tests](https://github.com/eScienceLab/flwrCrate/actions/workflows/tests.yml/badge.svg)](https://github.com/eScienceLab/flwrCrate/actions/workflows/tests.yml)
 [![real-app e2e](https://github.com/eScienceLab/flwrCrate/actions/workflows/realapps.yml/badge.svg)](https://github.com/eScienceLab/flwrCrate/actions/workflows/realapps.yml)