add line item standardized model

[fivetran-reneeli]

PR Overview

This PR will address the following Issue/Feature:

• Quarterly project

This PR will result in the following new package version:

• v0.13.0 for new model

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

Features

• Addition of the shopify__line_item_enhanced model. This model constructs a comprehensive, denormalized analytical table that enables reporting on key revenue, subscription, customer, and product metrics from your billing platform. It’s designed to align with the schema of the *__line_item_enhanced model found in Shopify, Recharge, Stripe, Zuora, and Recurly, offering standardized reporting across various billing platforms. To see the kinds of insights this model can generate, explore example visualizations in the Fivetran Billing Model Streamlit App. Visit the app for more details.

PR Checklist

Basic Validation

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

• [x] dbt run –full-refresh && dbt test
• [x] ~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)
• [x] 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 internal ticket for schema sample.

If you had to summarize this PR in an emoji, which would it be?

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