fix: skip draft PRs from processing (#323)

Draft PRs cannot be merged by GitHub and attempting to do so results
in a 405 error. This change skips draft PRs in both scheduled processing
and webhook handling to avoid unnecessary API calls and error logs.

Closes #199

Author: TooAngel

src/helpers/pullRequestProcessor.js

@@ -122,6 +122,14 @@ export async function processPullRequests() {
         console.log(`Found ${pullRequests.length} pull requests`);
 
         for (const pullRequest of pullRequests) {
+          // Skip draft PRs - they cannot be merged and should not be processed
+          if (pullRequest.draft) {
+            console.log(
+              `⏸️  Skipping draft PR #${pullRequest.number}: ${pullRequest.title}`
+            );
+            continue;
+          }
+
           const prResult = {
             number: pullRequest.number,
             title: pullRequest.title,
@@ -305,6 +313,11 @@ export async function processRepositoryPullRequests(owner, repo) {
   const results = [];
 
   for (const pullRequest of pullRequests) {
+    // Skip draft PRs
+    if (pullRequest.draft) {
+      continue;
+    }
+
     const pullRequestData = await getPullRequestData(
       githubClient,
       owner,

src/helpers/webhookHandler.js

@@ -120,6 +120,14 @@ export async function handlePullRequestWebhook(data) {
     return { error: 'No GitHub App configured' };
   }
 
+  // Skip draft PRs - they cannot be merged and should not be processed
+  if (pullRequest.draft) {
+    console.log(
+      `⏸️  Skipping draft PR #${pullRequest.number}: ${pullRequest.title}`
+    );
+    return { info: 'Draft PR skipped' };
+  }
+
   try {
     const installationId = dbRepository.installationId;
 
@@ -204,6 +212,14 @@ export async function handlePullRequestReviewWebhook(data) {
     return { error: 'No GitHub App configured' };
   }
 
+  // Skip draft PRs
+  if (pullRequest.draft) {
+    console.log(
+      `⏸️  Skipping review for draft PR #${pullRequest.number}: ${pullRequest.title}`
+    );
+    return { info: 'Draft PR review skipped' };
+  }
+
   try {
     const installationId = dbRepository.installationId;