Move Work Items, User Outbox, Section Outbox to Postgres

[pixiwyn]

branch off: origin/10391-dynamo-migrations-kysely-aurora-rds-tokens (till merged in)

DynamoDB Entities to Replace:

• user-outbox
• section-outbox
• work-item

OpenSearch Index to Remove:

• work-items

convert the functions in web-api/src/persistence/elasticsearch/work-items and web-api/src/persistence/dynamo/work-items to postgres kysely functions.

DynamoDB Functions to Move (unit tests can be removed):

OpenSearch Functions to Move (unit tests can be removed):

[pixiwyn]

Couple quick comments for work items so far.. the following fields need to come off:

• trialDate, trialLocation, leadDocketNumber (these are on case)
• docketNumberWithSuffix is computed off case
• proposing we move caseTitle and caseStatus to case and off work-item + message
• consider user-outbox and section-outbox as completed by in single table