feat: configure dependabot groups to batch related dependency updates

- Group Django-related packages together
- Group development tools (ruff, pre-commit, bandit)
- Group testing frameworks and tools
- Group minor and patch updates together
- Update pre-commit ruff version to match project dependencies

This reduces the number of individual dependabot PRs by batching related
dependencies into logical groups for easier review and testing.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: heysamtexas

.github/dependabot.yml

@@ -5,7 +5,24 @@
 
 version: 2
 updates:
-  - package-ecosystem: "pip" # See documentation for possible values
-    directory: "/" # Location of package manifests
+  - package-ecosystem: "pip"
+    directory: "/"
     schedule:
       interval: "weekly"
+    groups:
+      django:
+        patterns:
+          - "django*"
+      development:
+        patterns:
+          - "ruff"
+          - "pre-commit"
+          - "bandit*"
+      testing:
+        patterns:
+          - "pytest*"
+          - "*test*"
+      minor-updates:
+        update-types:
+          - "minor"
+          - "patch"

.pre-commit-config.yaml

@@ -12,7 +12,7 @@ repos:
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
   # Ruff version.
-  rev: v0.9.6
+  rev: v0.12.4
   hooks:
     # Run the linter.
     - id: ruff