Fix: state not set in file-provided pipelines

[hariso]

Description

This PR fixes the following bug.

Bug description
When Conduit is restarted with a pipeline, that was provided from a configuration file, the state is not correctly set after restart and lost.

Steps to reproduce

1. Start Conduit with a pipeline configuration file
2. Shut down Conduit gracefully
3. Start Conduit again

Expected behavior
After the restart, Conduit should start from the previous source position. Only new records are read.

Actual behavior
After the restart, Conduit re-reads all the records from source. Following can be found in logs:

could not apply old state, the connector will start from the beginning

Quick checks:

• I have followed the Code Guidelines.
• There is no other pull request for the same update/change.
• I have written unit tests.
• I have made sure that the PR is of reasonable size and can be easily reviewed.

[lovromazgon]

Good catch! 👍