feat: add MetricFlow compatibility patch for dbt-altertable

[fvaleye]

Summary

Using MetricFlow with dbt-altertable, dbt-metricflow only recognizes a hardcoded list of adapters.
This adds a minimal patch to AdapterBackedSqlClient.__init__ so it accepts the altertable adapter and routes it through DuckDB's SQL renderer, matching DuckLake's SQL dialect.
The patch is auto-applied when dbt-metricflow is installed.

[Copilot]

Pull request overview

Adds an optional MetricFlow compatibility shim so dbt-metricflow can work with the altertable adapter by routing SQL rendering through MetricFlow’s DuckDB renderer (matching DuckLake’s dialect), and wires it to auto-apply when MetricFlow is installed.

Changes:

• Add a metricflow optional dependency extra (dbt-metricflow>=0.12.0).
• Introduce an import-time monkeypatch of AdapterBackedSqlClient.__init__ to treat altertable as DUCKDB.
• Update uv.lock to include the new optional dependency and its transitive packages.

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 3 comments.

File	Description
uv.lock	Adds the metricflow extra and locks dbt-metricflow + transitive dependencies.
pyproject.toml	Defines the new optional dependency group metricflow.
dbt/adapters/altertable/metricflow.py	Implements the MetricFlow monkeypatch to route altertable through DuckDB SQL rendering.
dbt/adapters/altertable/__init__.py	Auto-imports the patch when MetricFlow is importable.

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 4 changed files in this pull request and generated 3 comments.

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