fix: align CodeRabbit and Copilot review configs with other repos

.coderabbit.yaml

@@ -1,6 +1,8 @@
+language: en-US
 reviews:
   auto_review:
     enabled: true
+    drafts: false
   path_instructions:
     - path: "scripts/**/*.sh"
       instructions: |
@@ -33,3 +35,5 @@ reviews:
     - "!**/*.png"
     - "!**/*.gif"
     - "!**/*.jpg"
+chat:
+  auto_reply: true

.github/copilot-instructions.md

@@ -1,4 +1,6 @@
-# Review Priorities
+# GitHub Copilot Code Review Instructions
+
+## Review Priority
 
 1. Shell script quality: shellcheck and shellharden compliance, proper
    quoting, error handling (set -euo pipefail), no hardcoded tokens
@@ -12,3 +14,12 @@
    permissions, no script injection
 6. Markdown quality: 120 char line limit, fenced code blocks, accurate
    documentation
+
+## Expectations
+
+- All shell scripts must pass shellcheck and shellharden without
+  suppressions.
+- Variables must be quoted (`"$VAR"`), braces only when needed.
+- No hardcoded credentials, account IDs, or tokens in any file.
+- Conventional commits required for all changes.
+- Fix lint violations directly instead of adding ignore comments.