SIENTIAPDE-1974-connectors-pi-web-api: Consolidate OPC server and tag data sourcing to the tag database. This change removes the legacy opc-servers collection and enforces tag_id as the sole reference for all read and write tags via connectors and connector_tags. The Orchestrator workflow now exclusively loads OPC server and tag information from the tag database, simplifying data flow and removing conditional logic for legacy data sources. Improved error reporting for pipeline timestamp updates and updated documentation, examples, and tests are also included.
