[Feature] Add created_at and updated at fields

[fivetran-avinash]

PR Overview

This PR will address the following Issue/Feature:

This PR will result in the following new package version:

Added fields into various models, but nothing in particular will break for the customer I believe.

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

• We introduced these present fields that existed in these sources to their equivalent staging models.
  • created_at: bill, credit_memo, invoice
  • updated_at: bill, credit_memo, deposit, invoice, journal_entry, purchase, refund_receipt, sales_receipt, vendor_credit
• These fields are then being brought in downstream in the dbt_quickbooks package in the quickbooks__general_ledger model via the double entry transaction intermediate models. You can learn more about these changes in the v0.17.0 release of the dbt_quickbooks package.

PR Checklist

Basic Validation

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

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

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

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

Detailed Validation

Please share any and all of your validation steps:

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