Add Dependabot for automated dependency updates

Configure daily dependency updates for pip (Python), GitHub Actions,
and Docker ecosystems. Groups minor/patch updates to reduce PR noise
and ignores major updates for elasticsearch and aiohttp.

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

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

Author: 3 people

.github/dependabot.yml

@@ -0,0 +1,56 @@
+#
+# Copyright 2025 The Apache Software Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+version: 2
+updates:
+  # 1) Python dependencies defined in pyproject.toml (pip ecosystem)
+  - package-ecosystem: "pip"
+    directory: "/"              # pyproject.toml is at repo root
+    schedule:
+      interval: "daily"
+      time: "06:00"
+      timezone: "UTC"
+    open-pull-requests-limit: 10
+    labels: ["dependencies", "python"]
+    # Optional: group minor/patch updates to reduce PR noise
+    groups:
+      prod-deps:
+        patterns: ["*"]
+        update-types: ["minor", "patch"]
+    # Avoid noisy majors that violate current constraints
+    ignore:
+      - dependency-name: "elasticsearch"
+        update-types: ["version-update:semver-major"]
+      - dependency-name: "aiohttp"
+        update-types: ["version-update:semver-major"]
+
+  # 2) GitHub Actions workflow versions in .github/workflows
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+      time: "06:10"
+      timezone: "UTC"
+    labels: ["dependencies", "ci"]
+
+  # 3) Docker base images in Dockerfile(s) and docker-compose
+  - package-ecosystem: "docker"
+    directory: "/"              # Dockerfile and docker-compose.yml at repo root
+    schedule:
+      interval: "daily"
+      time: "06:20"
+      timezone: "UTC"
+    labels: ["dependencies", "docker"]