[canbekley]

Summary

this pr does two things:

• dev_requirements.txt is moved to the dev group on the pyproject.toml. the centralization improves the visibility of the dev/ci version pinning, compared to what runtime versions are allowed for dbt-clickhouse installations. it also allows for further development in the direction of locking dev version (e.g. on a uv.lock) and using regularly upgraded and reviewed lockfiles for ci/dev dependencies.
• package runtime dependencies are being hardened: dap-core is now capped to <2.0 to ensure backwards compatibility. all of the dbt-labs adapters already pin to <2.0 because of anticipated issues with the major bump, which has recent release candidates (see issue Updated dbt-core dependency to <2.0 dbt-labs/dbt-adapters#2013). also we are adding dbt-common and agate as explicit dependencies now, because they are actively imported from code. the imports could break if dbt-adapters suddenly decided to not depend on those packages any longer.

Checklist

Delete items not relevant to your PR:

• A changelog entry was added following Updating the Changelog (user-facing, concise, PR link)
• For significant changes, documentation in docs was updated with further explanations or tutorials

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Note

Medium Risk
Tightening runtime dependency bounds affects every install and upgrade path; the exception import change is small but sits on the connection error-handling path.

Overview
Dev and CI dependencies move from dev_requirements.txt into a [dependency-groups] dev section in pyproject.toml. GitHub Actions (lint, integration steps, cloud tests) and CONTRIBUTING now install with pip install . --group dev (pip 25.1+); the separate setuptools upgrade step in lint is dropped. The docs-drift workflow no longer watches the removed file, and uv.lock is gitignored to support optional dev locking later.

Runtime packaging caps dbt-core at <2.0, and adds dbt-common and agate as direct dependencies (matching other dbt-labs adapters). connections.py imports DbtRuntimeError from dbt_common.exceptions instead of dbt.exceptions, consistent with the explicit dbt-common dependency.

CHANGELOG records the dependency improvement for users upgrading.

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