Add count_distinct_partner_id metric to partner_id column in dbt_orders

[lightdash]

Summary

• Added a count_distinct_partner_id metric under partner_id in models/dbt_orders.yml
• Metric is of type count_distinct, labelled "Number of Partners", with spotlight visibility set to show and categories verified and sales
• Mirrors the pattern of the existing count_distinct_user_id metric on the user_id column

Test plan

• Confirm the new metric appears in Lightdash under the Orders explore
• Verify it returns the correct count of unique partner IDs
• Check spotlight visibility and category tags are applied correctly

[lightdash]

🔍 Lightdash preview environment ready: https://analytics.lightdash.cloud/projects/86fc9f4b-0062-49be-817b-3817f8c5875b/home

Compiled from branch lightdash-ai-writeback/dc7ef84a-181c-4f89-a2b0-c335c19be2d2. Explores may take a minute to appear while the project compiles.

[github-actions]

🚀 Deployed 9c0b55e to https://analytics.lightdash.cloud/projects/7b88b49a-4b53-48b7-b0a9-ace12e8a1a7d/tables

[github-actions]

Lightdash Validation Results

Validating default project 8a223608-a1e4-426e-adcd-0598ea72b9f8

/opt/hostedtoolcache/Python/3.10.20/x64/lib/python3.10/site-packages/google/api_core/_python_version_support.py:254: FutureWarning: You are using a Python version (3.10.20) which Google will stop supporting in new releases of google.api_core once it reaches its end of life (2026-10-04). Please upgrade to the latest Python version, or at least Python 3.11, to continue receiving updates for google.api_core past that date.
  warnings.warn(message, FutureWarning)
/opt/hostedtoolcache/Python/3.10.20/x64/lib/python3.10/site-packages/google/api_core/_python_version_support.py:254: FutureWarning: You are using a Python version (3.10.20) which Google will stop supporting in new releases of google.cloud.dataproc_v1 once it reaches its end of life (2026-10-04). Please upgrade to the latest Python version, or at least Python 3.11, to continue receiving updates for google.cloud.dataproc_v1 past that date.
  warnings.warn(message, FutureWarning)

- SUCCESS> dbt_users 
- SUCCESS> dbt_support_requests 
- SUCCESS> dbt_baskets 
- SUCCESS> dbt_orders 
- SUCCESS> dbt_orders_no_preagg 

Compiled 5 explores, SUCCESS=5 ERRORS=0
-   Waiting for validation to finish
✔   Validation finished without errors in 18s (5 chart configuration warnings hidden, use --show-chart-configuration-warnings to show)
Done 🕶

This validation check is informational and does not block merging.