chore: add a precommit hook for signing commit (opendatahub-io#1230)

* chore: add a precommit hook for signing commit

Signed-off-by: Debarati Basu-Nag <dbasunag@redhat.com>

* fix: Update based on review comment

Signed-off-by: Debarati Basu-Nag <dbasunag@redhat.com>

---------

Signed-off-by: Debarati Basu-Nag <dbasunag@redhat.com>

Author: dbasunag

.pre-commit-config.yaml

@@ -41,14 +41,6 @@ repos:
       - id: ruff
       - id: ruff-format
 
-  # https://github.com/renovatebot/pre-commit-hooks/issues/2621
-  # This hook goes over the 250MiB limit that pre-commit.ci imposes
-  # Disable unless a solution is found.
-  # - repo: https://github.com/renovatebot/pre-commit-hooks
-  #   rev: 39.45.0
-  #   hooks:
-  #     - id: renovate-config-validator
-
   - repo: https://github.com/gitleaks/gitleaks
     rev: v8.30.1
     hooks:
@@ -62,6 +54,18 @@ repos:
         exclude: ^(docs/|.*test.*\.py$|utilities/manifests/.*|utilities/plugins/tgis_grpc/.*)
 
 
+  - repo: local
+    hooks:
+      - id: check-signoff
+        name: Check Signed-off-by
+        stages: [commit-msg]
+        language: system
+        entry: >
+          bash -c 'grep -q "^Signed-off-by: .* <.*@.*>" "$1" ||
+          { echo "ERROR: Commit message must include a valid Signed-off-by trailer.";
+          echo "  Use: git commit -s";
+          echo "  Or add manually: Signed-off-by: Your Name <your@email.com>"; exit 1; }' --
+
   - repo: https://github.com/espressif/conventional-precommit-linter
     rev: v1.11.0
     hooks: