refactor: replace bash parsing with JavaScript script

- Create .github/scripts/parse-metrics.mjs for robust markdown parsing
- Replace complex bash/awk parsing with proper JavaScript logic
- Better error handling and debug output
- Should correctly parse time values and handle edge cases

.github/scripts/parse-metrics.mjs

@@ -0,0 +1,88 @@
+#!/usr/bin/env node
+
+import { readFileSync, existsSync } from 'fs';
+import { writeFileSync } from 'fs';
+
+function parseMetricsTable(content, metricName) {
+  const lines = content.split('\n');
+
+  for (let i = 0; i < lines.length; i++) {
+    const line = lines[i].trim();
+    if (line.includes(metricName)) {
+      // Split by | and get the value column (usually index 2)
+      const columns = line.split('|').map(col => col.trim());
+      if (columns.length >= 3) {
+        return columns[2] || 'N/A';
+      }
+    }
+  }
+  return 'N/A';
+}
+
+function parseCountMetric(content, metricName) {
+  const result = parseMetricsTable(content, metricName);
+  // Try to extract just the number if it's a valid number
+  const number = parseInt(result);
+  return isNaN(number) ? 0 : number;
+}
+
+function main() {
+  const metrics = {
+    issues_created: 0,
+    issues_closed: 0,
+    prs_created: 0,
+    prs_merged: 0,
+    avg_first_response: 'N/A',
+    avg_time_to_close: 'N/A',
+    pr_avg_merge_time: 'N/A'
+  };
+
+  // Parse issue metrics
+  if (existsSync('issue_metrics.md')) {
+    const issueContent = readFileSync('issue_metrics.md', 'utf8');
+    console.log('DEBUG: Parsing issue metrics...');
+
+    metrics.issues_created = parseCountMetric(issueContent, 'Total number of items created');
+    metrics.issues_closed = parseCountMetric(issueContent, 'Number of items closed');
+    metrics.avg_first_response = parseMetricsTable(issueContent, 'Time to first response');
+    metrics.avg_time_to_close = parseMetricsTable(issueContent, 'Time to close');
+
+    console.log('Issues created:', metrics.issues_created);
+    console.log('Issues closed:', metrics.issues_closed);
+    console.log('Avg first response:', metrics.avg_first_response);
+    console.log('Avg time to close:', metrics.avg_time_to_close);
+  } else {
+    console.log('No issue_metrics.md found');
+  }
+
+  // Parse PR metrics
+  if (existsSync('pr_metrics.md')) {
+    const prContent = readFileSync('pr_metrics.md', 'utf8');
+    console.log('DEBUG: Parsing PR metrics...');
+
+    metrics.prs_created = parseCountMetric(prContent, 'Total number of items created');
+    metrics.prs_merged = parseCountMetric(prContent, 'Number of items closed');
+    metrics.pr_avg_merge_time = parseMetricsTable(prContent, 'Time to close');
+
+    console.log('PRs created:', metrics.prs_created);
+    console.log('PRs merged:', metrics.prs_merged);
+    console.log('PR avg merge time:', metrics.pr_avg_merge_time);
+  } else {
+    console.log('No pr_metrics.md found');
+  }
+
+  // Output for GitHub Actions
+  const output = Object.entries(metrics)
+    .map(([key, value]) => `${key}=${value}`)
+    .join('\n');
+
+  console.log('\nFinal metrics:');
+  console.log(output);
+
+  // Write to GITHUB_OUTPUT if in GitHub Actions
+  if (process.env.GITHUB_OUTPUT) {
+    writeFileSync(process.env.GITHUB_OUTPUT, output + '\n', { flag: 'a' });
+  }
+}
+
+main();