tpg366: Make acq process robust to network disruptions

[BrianJKoopman]

Description

This PR adds error handling to the Pfeiffer TPG366 agent. I separated the driver class out to its own module, renamed it to something more specific (since we have other Pfeiffer devices), and made it a subclass of TCPInterface to enable error handling.

Motivation and Context

Resolves #1000.

How Has This Been Tested?

This has been tested in the following scenarios:

• Test error handling when the device is offline during agent startup
• Test error handling with acq running when network connection is interrupted
• Test error handling with acq running when the device is power cycled

From power off:

2026-05-22T17:35:58-0400 startup-op: launching acq
2026-05-22T17:35:58-0400 start called for acq
2026-05-22T17:35:58-0400 acq:0 Status is now "starting".
2026-05-22T17:35:58-0400 acq:0 Status is now "running".
2026-05-22T17:35:58-0400 Connection not established.
2026-05-22T17:35:58-0400 Resetting the connection to the device.
2026-05-22T17:36:08-0400 Connection not established within 10 seconds.
2026-05-22T17:36:08-0400 Failed to get data from device. Check network connection.
2026-05-22T17:36:09-0400 Connection not established.
2026-05-22T17:36:09-0400 Resetting the connection to the device.
2026-05-22T17:36:13-0400 Connection re-established.

Through network disconnect:

2026-05-22T17:32:31-0400 startup-op: launching acq
2026-05-22T17:32:31-0400 start called for acq
2026-05-22T17:32:31-0400 acq:0 Status is now "starting".
2026-05-22T17:32:31-0400 acq:0 Status is now "running".
2026-05-22T17:32:52-0400 Failed to get data from device. Check network connection.
2026-05-22T17:33:03-0400 Failed to get data from device. Check network connection.
2026-05-22T17:33:08-0400 Caught unexpected error: invalid literal for int() with base 10: '\x06'
2026-05-22T17:33:09-0400 WARN: Did not receive ACK. Attempting to drain buffer.
2026-05-22T17:33:09-0400 Buffer contents: b'\x06\r\n'
2026-05-22T17:33:09-0400 Resending command: b'PRX\r\n'
2026-05-22T17:33:09-0400 Connection re-established.

Through power cycle:

2026-05-22T17:33:54-0400 Failed to get data from device. Check network connection.
2026-05-22T17:34:05-0400 Failed to get data from device. Check network connection.
2026-05-22T17:34:10-0400 Connection error: [Errno 104] Connection reset by peer
2026-05-22T17:34:10-0400 Failed to get data from device. Check network connection.
2026-05-22T17:34:11-0400 Connection error: [Errno 32] Broken pipe
2026-05-22T17:34:11-0400 Resetting the connection to the device.
2026-05-22T17:34:11-0400 Connection re-established.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.