Configurable Admin server port

[maxdml]

Currently we default to 3001.

[shirzady1934]

@maxdml I’ve opened PR #99 to make the Admin Server port configurable.

• Added AdminServerPort field in Config (defaults to 3001 if not set).
• Updated server startup to respect the configured port.
• Adjusted tests to use an isolated port and added health checks.
• Verified all TestAdminServer cases pass against a local Postgres instance.

This should resolve the hard-coded 3001 issue. ✅

[maxdml]

Thanks @shirzady1934, appreciate your contribution!