chore: restore DCO check, trim README badges to PyPI and Python only

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Deborah Jacob <deborah@botanu.ai>

Author: deborahjacob-botanu

.github/workflows/ci.yml

@@ -89,3 +89,18 @@ jobs:
         with:
           name: dist
           path: dist/
+
+  # -------------------------------------------------------------------
+  # DCO sign-off check
+  # -------------------------------------------------------------------
+  dco:
+    runs-on: ubuntu-latest
+    if: github.event_name == 'pull_request'
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: DCO check
+        uses: christophebedard/dco-check@0.5.0
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

README.md

@@ -1,10 +1,7 @@
 # Botanu SDK for Python
 
-[![CI](https://github.com/botanu-ai/botanu-sdk-python/actions/workflows/ci.yml/badge.svg)](https://github.com/botanu-ai/botanu-sdk-python/actions/workflows/ci.yml)
 [![PyPI version](https://img.shields.io/pypi/v/botanu)](https://pypi.org/project/botanu/)
 [![Python](https://img.shields.io/badge/python-3.9%20|%203.10%20|%203.11%20|%203.12%20|%203.13-blue)](https://www.python.org/)
-[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](LICENSE)
-[![LF AI & Data](https://img.shields.io/badge/LF%20AI%20%26%20Data-member-blue)](https://lfaidata.foundation/)
 
 **Run-level cost attribution for AI workflows, built on OpenTelemetry.**