[Bugfix] Add limit 0 to `credits_used` and `usage_cost` to fix Postgres errors

[fivetran-avinash]

PR Overview

This PR will address the following Issue/Feature: [#104]

This PR will result in the following new package version: 1.4.2

**Please provide the finalized CHANGELOG entry which details the relevant changes included in this PR:**

Bug Fixes

• Adjusted staging models stg_fivetran_platform__credits_used and stg_fivetran_platform__usage_cost to return empty tables if the respective fivetran_platform__credits_pricing and the fivetran_platform__usage_pricing variables for each model are disabled to avoid Postgres data type errors if those tables are null.

Under the Hood

• Added additional scripts to run_models.sh for the package with the variables fivetran_platform__credits_pricing set to false and fivetran_platform__usage_pricing set to true to recreate the error.
• Updated seed files to ensure downstream models properly populate into fivetran_platform__usage_mar_destination_history for validating this PR.

PR Checklist

Basic Validation

Please acknowledge that you have successfully performed the following commands locally:

• [x] dbt run –full-refresh && dbt test
• [NA] dbt run (if incremental models are present) && dbt test

Before marking this PR as "ready for review" the following have been applied:

• [x] The appropriate issue has been linked, tagged, and properly assigned
• [x] All necessary documentation and version upgrades have been applied
• [x] docs were regenerated (unless this PR does not include any code or yml updates)
• [ ] BuildKite integration tests are passing
• [x] Detailed validation steps have been provided below

Detailed Validation

Please share any and all of your validation steps: See Height ticket

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[fivetran-avinash]

@fivetran-joemarkiewicz Changes applied and ready for re-review.