deploy: add deployment configuration files for new agents

[github-actions]

This PR adds AVCTL deployment configuration files for new agents.

[sentry]

Bug: The agent's deployment configuration fails to set the necessary environment variables for inter-agent communication, causing silent failures in chained agent functionality.
_{Severity: HIGH}

Suggested Fix

Update the deployment process to populate the required environment variables for inter-agent communication. This can be done by modifying the deploy-all-agents.sh script to pass the addresses, or by using a .env file with the format AGENT_ADDRESS={{ .AgentName.Address }} to resolve agent dependencies at deployment time.

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent.
Verify if this is a real issue. If it is, propose a fix; if not, explain why it's not
valid.

Location: 6-deployed-agents/chained/blog-creator-agent/.avctl/config.toml#L2

Potential issue: The agent code expects dependent agent addresses to be provided via
environment variables like `TOPIC_AGENT_ADDRESS`. However, the deployment configuration
only sets the agent's own address in `.avctl/config.toml`, and the deployment script
does not set the required environment variables for inter-agent communication. Although
the agents include null checks to prevent crashes, this misconfiguration will cause them
to silently fail and return without processing any requests, rendering the chained agent
functionality completely non-functional upon deployment.

_{Did we get this right? 👍 / 👎 to inform future reviews.}