Add integration tests for ephemeral models rendered as empty operators

[pankajkoti]

Adds integration coverage for #1133.

Adds a customers -> ephemeral_customers -> ephemeral_customers_downstream lineage to the altered_jaffle_shop test project and DbtDag tests (rendering via dbt ls) asserting that the ephemeral model renders as an EmptyOperator by default with the dependency chain preserved, and as a dbt run task when the option is disabled. Updates the node-count assertions for the two added models.

Regenerates the project's committed manifest.json (dbt 1.11.2, schema v12) for the new models; this also drops a stale multibyte model node whose .sql file had already been removed from disk.

Stacked on #2759 — review and merge that first.

🤖 Generated with Claude Code

[pankajkoti]

The PR is ready for review. Please do not merge this PR. It relies on #2759 to be merged first.

[tatiana]

Thanks, @pankajkoti , these look great!

[Copilot]

Pull request overview

Adds integration test coverage to ensure dbt ephemeral models render as EmptyOperator by default (while preserving the dependency chain), and as a normal dbt run task when the behavior is disabled. Updates the altered dbt test project and related node-count assertions, and regenerates the committed manifest.json to reflect the new models and remove a stale node.

Changes:

• Add integration tests that assert ephemeral models render as EmptyOperator by default and as DbtRunLocalOperator when disabled.
• Extend the altered_jaffle_shop dbt test project with customers -> ephemeral_customers -> ephemeral_customers_downstream.
• Regenerate the altered project manifest.json and update node-count expectations in graph tests.

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
tests/test_converter.py	Adds integration tests validating DbtDag task types and dependency preservation for ephemeral models.
tests/dbt/test_graph.py	Updates expected node counts for altered dbt project after adding two models.
cosmos/airflow/graph.py	Adds (but currently duplicates) logic to render ephemeral models as EmptyOperator.
dev/dags/dbt/altered_jaffle_shop/models/ephemeral_customers.sql	New ephemeral dbt model used by integration tests.
dev/dags/dbt/altered_jaffle_shop/models/ephemeral_customers_downstream.sql	New downstream model referencing the ephemeral model.
dev/dags/dbt/altered_jaffle_shop/target/manifest.json	Regenerated manifest fixture reflecting new models and removal of a stale node.

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 5 changed files in this pull request and generated no new comments.

[Copilot]

Pull request overview

Copilot reviewed 4 out of 5 changed files in this pull request and generated 1 comment.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.28%. Comparing base (a18e4d9) to head (1ba9a85).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2760   +/-   ##
=======================================
  Coverage   98.28%   98.28%           
=======================================
  Files         107      107           
  Lines        7923     7923           
=======================================
  Hits         7787     7787           
  Misses        136      136           

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