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  <title>CTA After Architecture v5</title>
  <desc>Web and mobile clients call the CTA Service. CTA Service calls Apollo GraphQL Router, which routes to the CTA Content Orchestrator. The orchestrator has a DynamoDB store, exposes a personalization API to content services, fans out via the router to 4 content services, and publishes events to Kafka which Databricks consumes for analytics and ML.</desc>

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  <!-- Background -->
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  <!-- ── Clients ── -->
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  <!-- Clients → CTA Service -->
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  <!-- ── CTA Service ── -->
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    <text class="th" x="280" y="136" text-anchor="middle" dominant-baseline="central">CTA service</text>
    <text class="ts" x="280" y="156" text-anchor="middle" dominant-baseline="central">4,000 req/s · 250 ms budget · direct from clients</text>
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  <!-- CTA Service → Router -->
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  <!-- ── Apollo GraphQL Router ── -->
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  <!-- Router → Orchestrator -->
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  <!-- ── CTA Content Orchestrator ── -->
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  <!-- Orchestrator → DynamoDB (left) -->
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  <!-- Kafka → Databricks -->
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  <!-- ── Databricks ── -->
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  <!-- Orchestrator → Router loop back -->
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  <!-- Fan-out label -->
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  <!-- ── Content Services ── -->
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  <!-- Content services → personalization API -->
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  <!-- Content services → data stores -->
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