chore: update dependencies and version to 4.0.0-beta.4

- Bump version from 4.0.0-beta.3 to 4.0.0-beta.4 in package.json
- Update various dependencies including:
  - @elastic/elasticsearch to 9.1.1
  - @eosrio/node-abieos to 4.0.3-f7d5b45
  - @fastify/cors to 11.1.0
  - @fastify/swagger to 9.5.2
  - @wharfkit/antelope to 1.1.1
  - amqplib to 0.10.9
  - commander to 14.0.1
  - dotenv to 17.2.3
  - fastify to 5.6.1
  - ioredis to 5.8.0
  - mongodb to 6.20.0
  - nodemailer to 7.0.6
  - typescript to 5.9.2
  - undici to 7.16.0
  - zod to 4.1.11
- Update devDependencies including:
  - @types/async to 3.2.25
  - @types/node to 24.6.0
  - @types/nodemailer to 7.0.2

feat: add rabbit.sh for RabbitMQ installation

- Create a new script rabbit.sh to automate the installation of RabbitMQ and its dependencies on Ubuntu.

fix: update explorer metadata to include oracle configuration

- Modify the explorer metadata route to include oracle configuration from the manager and check for the existence of the oracle price histogram route.

fix: ensure MongoDB client is correctly typed

- Update the MongoDB client assignment in the server to use unknown as a workaround for type compatibility.

refactor: clean up plugin loading logic

- Remove unnecessary console error logs in the plugin loading process and improve type definition for plugin state.

Author: igorls