ci: setup dependabot and pull request template

Author: sergeyklay

.github/CODEOWNERS

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+* @sergeyklay @cicdbot

.github/dependabot.yml

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+version: 2
+
+updates:
+  - package-ecosystem: gomod
+    directory: /
+    schedule:
+      interval: weekly
+      day: monday
+    target-branch: main
+    assignees: [cicdbot]
+    open-pull-requests-limit: 10
+    labels:
+      - dependencies
+      - go
+    commit-message:
+      prefix: "chore"
+      include: "scope"
+    groups:
+      go-minor-patch:
+        update-types:
+          - minor
+          - patch
+        patterns:
+          - "*"
+
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly
+      day: monday
+    target-branch: main
+    assignees: [cicdbot]
+    open-pull-requests-limit: 10
+    labels:
+      - dependencies
+      - github_actions
+    commit-message:
+      prefix: "ci"
+      include: "scope"
+    groups:
+      actions:
+        patterns:
+          - "*"

.github/pull_request_template.md

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+### 🎯 Scope & Context
+
+**Type:** [Feat | Fix | Refactor | Chore | Perf]
+
+**Intent:** [1-2 sentences explaining the business or technical goal - the "Why"]
+
+**Related Issues:** [#123, PROJ-456, etc. - Remove this line if none]
+
+### 🧭 Reviewer Guide
+
+**Complexity:** [Low | Medium | High]
+
+#### Entry Point
+
+[Identify the most critical or complex file where the reviewer should start. Explain what the file is and why it's important to understand the changes.]
+
+#### Sensitive Areas
+
+- `path/to/file`: [Brief description of why this needs extra scrutiny]
+
+### ⚠️ Risk Assessment
+
+- **Breaking Changes:** [Yes + details | No breaking changes]
+- **Migrations/State:** [Database migrations or manual steps required | No migrations or state changes]