i use websockets, durable objects, queues, d1, and cron jobs

  async tail(events, env, ctx) {
    // Check if events array exists and has items
    if (!Array.isArray(events) || events.length === 0) {
      return new Response("No events found", { status: 200 });
    }

    // Only proceed if there's an exception AND exceptions array is not empty
    const event = events[0];
    if (event.outcome !== "exception" || !event.exceptions?.length) {
      return new Response("No exception found", { status: 200 });
    }

    // Log the event structure to help us understand the data
    console.log("Tail worker event:", JSON.stringify(events, null, 2));

...

  async tail(events, env, ctx) {
    // Check if events array exists and has items
    if (!Array.isArray(events) || events.length === 0) {
      return new Response("No events found", { status: 200 });
    }

    // Only proceed if there's an exception AND exceptions array is not empty
    const event = events[0];
    if (event.outcome !== "exception" || !event.exceptions?.length) {
      return new Response("No exception found", { status: 200 });
    }

    // Log the event structure to help us understand the data
    console.log("Tail worker event:", JSON.stringify(events, null, 2));

...

        const payload = await step.do('prepares payload', async () => {
            const isDev = this.env.ENVIRONMENT === 'dev';
            const data = isDev ? mockData : event.payload;
            
            console.log("Received payload:", JSON.stringify(data, null, 2));
            throw new Error("Testing error handling with payload data");
            
            return data;
        });

        const payload = await step.do('prepares payload', async () => {
            const isDev = this.env.ENVIRONMENT === 'dev';
            const data = isDev ? mockData : event.payload;
            
            console.log("Received payload:", JSON.stringify(data, null, 2));
            throw new Error("Testing error handling with payload data");
            
            return data;
        });

export class NeverGonnaWorkflow extends WorkflowEntrypoint<Env, NeverGonnaParams> {
    async run(event: WorkflowEvent<NeverGonnaParams>, step: WorkflowStep) {
        const { to, host, content } = event.payload;
        await step.sleep('wait for the right moment', '135 seconds');
        const callSid = await step.do('call person back', async () => {
            const client = new Twilio(this.env.TWILIO_ACCOUNT_SID, this.env.TWILIO_AUTH_TOKEN);
            // Say verb here does text to speech
            // Play allows you to play media.
            // The mp3 file is hosted on Cloudflare Workers using dynamic assets
            const twiml = `
            <Response>
                <Say>Hello from a Cloudflare Workflow!</Say>
                <Say>You said "${content}".</Say>
                <Say>Check out this classic:</Say>
                <Play>https://${host}/classic.mp3</Play>
            </Response>`;
            const call = await client.calls.create({
                to,
                from: this.env.TWILIO_PHONE_NUMBER,
                twiml,
            });
            return call.sid;
        });

        return { success: true, callSid };   // <------ How to use this?

    }
}

export class NeverGonnaWorkflow extends WorkflowEntrypoint<Env, NeverGonnaParams> {
    async run(event: WorkflowEvent<NeverGonnaParams>, step: WorkflowStep) {
        const { to, host, content } = event.payload;
        await step.sleep('wait for the right moment', '135 seconds');
        const callSid = await step.do('call person back', async () => {
            const client = new Twilio(this.env.TWILIO_ACCOUNT_SID, this.env.TWILIO_AUTH_TOKEN);
            // Say verb here does text to speech
            // Play allows you to play media.
            // The mp3 file is hosted on Cloudflare Workers using dynamic assets
            const twiml = `
            <Response>
                <Say>Hello from a Cloudflare Workflow!</Say>
                <Say>You said "${content}".</Say>
                <Say>Check out this classic:</Say>
                <Play>https://${host}/classic.mp3</Play>
            </Response>`;
            const call = await client.calls.create({
                to,
                from: this.env.TWILIO_PHONE_NUMBER,
                twiml,
            });
            return call.sid;
        });

        return { success: true, callSid };   // <------ How to use this?

    }
}

const uploads = await Promise.all(
    batch.map(async (image, index) => {
        // Add 1 second sleep between uploads, but not before the first one
        if (index > 0) {
            await step.sleep(`delay-upload-${i}-${index}`, "1 second");
        }

        return step.do(
            `process-image-${i}`,
            {
                retries: {
                    limit: 3,
                    delay: "5 seconds",
                    backoff: "exponential",
                },
            },
            () => this.downloadAndUploadImage(image, orgId)
        );
    })
);

const uploads = await Promise.all(
    batch.map(async (image, index) => {
        // Add 1 second sleep between uploads, but not before the first one
        if (index > 0) {
            await step.sleep(`delay-upload-${i}-${index}`, "1 second");
        }

        return step.do(
            `process-image-${i}`,
            {
                retries: {
                    limit: 3,
                    delay: "5 seconds",
                    backoff: "exponential",
                },
            },
            () => this.downloadAndUploadImage(image, orgId)
        );
    })
);