Make tunnel-ssh autoClose configurable

[d-mato]

Description

Makes the tunnel-ssh autoClose option configurable to support HTTP-based database drivers like ClickHouse.

Fixes #1529

Changes

• Added optional tunnelOptions parameter to createSshTunnel method
• Exposed close() method in return value for manual tunnel control
• Default behavior unchanged (backward compatible)

Usage

// Custom tunnel options
const tunnel = await this.createSshTunnel(
  sshConfig,
  dbConfig,
  { autoClose: false }
);

// Manually close when needed
tunnel.close();

---

• Your code builds clean without any errors or warnings
• You have made the needed changes to the docs
• You have written a description of what is the purpose of this pull request above

[gjsjohnmurray]

Thanks. This looks good to me.