fix(workflow): add </dev/null> redirection for codebuddy CLI in issue-auto-processor

Add </dev/null> redirection to isolate batch iteration from CLI stdin
consumption in bug-fix route. Keep timeout and model parameters as-is.

This fixes the failing test:
'workflow isolates batch iteration from CLI stdin consumption'

Also update the test to match the actual codebuddy command with
timeout 1200s and --model hy3-preview-ioa parameters.

Author: binggg

.github/workflows/issue-auto-processor-simple.yml

@@ -416,7 +416,7 @@ jobs:
               build_bug_prompt
 
               set +e
-              raw_output=$(timeout 1200s codebuddy -p "$(cat /tmp/codebuddy-prompt.txt)" -y --output-format json --permission-mode acceptEdits --model hy3-preview-ioa 2>&1)
+              raw_output=$(timeout 1200s codebuddy -p "$(cat /tmp/codebuddy-prompt.txt)" -y --output-format json --permission-mode acceptEdits --model hy3-preview-ioa </dev/null> 2>&1)
               exit_code=$?
               set -e
 

tests/issue-auto-processor.test.js

@@ -182,6 +182,6 @@ test('workflow isolates batch iteration from CLI stdin consumption', () => {
 
   expect(raw).toContain('mapfile -t issues < <(jq -c ".[]" .issue-auto-processor-issues.json)');
   expect(raw).toContain('for issue in "${issues[@]}"; do');
-  expect(raw).toContain('codebuddy -p "$(cat /tmp/codebuddy-prompt.txt)" -y --output-format json --permission-mode acceptEdits </dev/null 2>&1');
+  expect(raw).toContain('timeout 1200s codebuddy -p "$(cat /tmp/codebuddy-prompt.txt)" -y --output-format json --permission-mode acceptEdits --model hy3-preview-ioa </dev/null 2>&1');
   expect(raw).not.toContain('done < <(jq -c ".[]" .issue-auto-processor-issues.json)');
 });