fix: split sync workflow into separate files to fix job skipping issue

The previous combined workflow had flawed conditional logic that caused
sync-keyword and sync-metrics jobs to be skipped. GitHub Actions doesn't
populate github.event.schedule with the cron expression, so the equality
checks never matched.

Replaced with three separate workflow files:
- sync-changes.yml: Runs every 2 minutes
- sync-keyword.yml: Runs every 15 minutes
- sync-metrics.yml: Runs every hour

Each workflow can be manually triggered via workflow_dispatch.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.github/workflows/sync-changes.yml

@@ -0,0 +1,18 @@
+name: Sync NPM Changes Feed
+
+on:
+  schedule:
+    # Run every 2 minutes
+    - cron: '*/2 * * * *'
+  workflow_dispatch:
+
+jobs:
+  sync-changes:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Trigger changes feed sync
+        run: |
+          curl -X POST "${{ secrets.VERCEL_PRODUCTION_URL }}/api/sync/changes" \
+            -H "Authorization: Bearer ${{ secrets.CRON_SECRET }}" \
+            -H "Content-Type: application/json" \
+            -f -s -S -w "\nHTTP Status: %{http_code}\n"

.github/workflows/sync-keyword.yml

@@ -0,0 +1,18 @@
+name: Sync NPM Keyword Search
+
+on:
+  schedule:
+    # Run every 15 minutes
+    - cron: '*/15 * * * *'
+  workflow_dispatch:
+
+jobs:
+  sync-keyword:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Trigger keyword search sync
+        run: |
+          curl -X POST "${{ secrets.VERCEL_PRODUCTION_URL }}/api/sync/keyword" \
+            -H "Authorization: Bearer ${{ secrets.CRON_SECRET }}" \
+            -H "Content-Type: application/json" \
+            -f -s -S -w "\nHTTP Status: %{http_code}\n"

.github/workflows/sync-metrics.yml

@@ -0,0 +1,18 @@
+name: Sync NPM Metrics
+
+on:
+  schedule:
+    # Run every hour
+    - cron: '0 * * * *'
+  workflow_dispatch:
+
+jobs:
+  sync-metrics:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Trigger metrics sync
+        run: |
+          curl -X POST "${{ secrets.VERCEL_PRODUCTION_URL }}/api/sync/metrics" \
+            -H "Authorization: Bearer ${{ secrets.CRON_SECRET }}" \
+            -H "Content-Type: application/json" \
+            -f -s -S -w "\nHTTP Status: %{http_code}\n"

.github/workflows/sync.yml

@@ -1,71 +0,0 @@
-name: NPM Package Sync
-
-on:
-  schedule:
-    # Changes feed: Every 2 minutes
-    - cron: '*/2 * * * *'
-    # Keyword search: Every 15 minutes
-    - cron: '*/15 * * * *'
-    # Metrics: Every hour
-    - cron: '0 * * * *'
-  workflow_dispatch:
-    inputs:
-      sync_type:
-        description: 'Type of sync to run'
-        required: true
-        type: choice
-        options:
-          - changes
-          - keyword
-          - metrics
-          - all
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.event.inputs.sync_type || 'scheduled' }}
-  cancel-in-progress: false
-
-jobs:
-  sync-changes:
-    runs-on: ubuntu-latest
-    # Run on schedule every 2 minutes OR manual trigger with 'changes' or 'all'
-    if: |
-      github.event.schedule == '*/2 * * * *' ||
-      github.event.inputs.sync_type == 'changes' ||
-      github.event.inputs.sync_type == 'all'
-    steps:
-      - name: Trigger changes feed sync
-        run: |
-          curl -X POST "${{ secrets.VERCEL_PRODUCTION_URL }}/api/sync/changes" \
-            -H "Authorization: Bearer ${{ secrets.CRON_SECRET }}" \
-            -H "Content-Type: application/json" \
-            -f -s -S -w "\nHTTP Status: %{http_code}\n"
-
-  sync-keyword:
-    runs-on: ubuntu-latest
-    # Run on schedule every 15 minutes OR manual trigger with 'keyword' or 'all'
-    if: |
-      github.event.schedule == '*/15 * * * *' ||
-      github.event.inputs.sync_type == 'keyword' ||
-      github.event.inputs.sync_type == 'all'
-    steps:
-      - name: Trigger keyword search sync
-        run: |
-          curl -X POST "${{ secrets.VERCEL_PRODUCTION_URL }}/api/sync/keyword" \
-            -H "Authorization: Bearer ${{ secrets.CRON_SECRET }}" \
-            -H "Content-Type: application/json" \
-            -f -s -S -w "\nHTTP Status: %{http_code}\n"
-
-  sync-metrics:
-    runs-on: ubuntu-latest
-    # Run on schedule every hour OR manual trigger with 'metrics' or 'all'
-    if: |
-      github.event.schedule == '0 * * * *' ||
-      github.event.inputs.sync_type == 'metrics' ||
-      github.event.inputs.sync_type == 'all'
-    steps:
-      - name: Trigger metrics sync
-        run: |
-          curl -X POST "${{ secrets.VERCEL_PRODUCTION_URL }}/api/sync/metrics" \
-            -H "Authorization: Bearer ${{ secrets.CRON_SECRET }}" \
-            -H "Content-Type: application/json" \
-            -f -s -S -w "\nHTTP Status: %{http_code}\n"