chore: export ConstraintType and InequalityOperator from config init

[johnnygreco]

📋 Summary

Exports ConstraintType and InequalityOperator from the data_designer.config public API so users can access these constraint-related types directly via import data_designer.config as dd.

🔄 Changes

✨ Added

• ConstraintType and InequalityOperator to the TYPE_CHECKING imports in config/__init__.py for IDE support
• ConstraintType and InequalityOperator to the _LAZY_IMPORTS dict for runtime lazy loading

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Greptile Overview

Greptile Summary

• Updates the config public API layer to lazily export ConstraintType and InequalityOperator from data_designer.config.sampler_constraints, matching the existing __getattr__ lazy-load pattern.
• Adds these symbols to the TYPE_CHECKING import block so IDE/type-checkers see them without incurring runtime imports.
• Also AGENTS.md documentation to list EmbeddingColumnConfig and CustomColumnConfig among column configuration types.
• PR metadata appears inconsistent with the head commit content, so verify the branch/commit range actually includes the intended config/__init__.py changes.

Confidence Score: 3/5

• This PR is likely safe code-wise, but the commit/PR metadata mismatch needs to be resolved before merging to ensure the intended changes are actually included.
• The config/__init__.py additions follow the established lazy-export pattern and reference symbols that exist in sampler_constraints.py. However, the head SHA shown only contains an AGENTS.md change, so there is a concrete risk the PR as currently formed won't include the described API export change unless the correct commits are present.
• AGENTS.md and the PR commit range/changed-files list (ensure packages/data-designer-config/src/data_designer/config/init.py is actually part of the PR).

Important Files Changed

Filename	Overview
AGENTS.md	Updates the guidance list of column configuration types (adds EmbeddingColumnConfig and CustomColumnConfig), but the PR metadata/description claims unrelated config public API exports.
packages/data-designer-config/src/data_designer/config/init.py	Adds lazy exports for ConstraintType and InequalityOperator plus TYPE_CHECKING imports; change itself is straightforward and consistent with existing lazy import pattern.

Sequence Diagram

sequenceDiagram
  participant User as User code
  participant Config as data_designer.config (__init__)
  participant Importlib as importlib
  participant SC as data_designer.config.sampler_constraints

  User->>Config: import data_designer.config as dd
  User->>Config: access dd.ConstraintType
  Config->>Config: __getattr__("ConstraintType")
  Config->>Importlib: import_module("data_designer.config.sampler_constraints")
  Importlib-->>SC: load module
  SC-->>Config: module object
  Config->>SC: getattr(ConstraintType)
  SC-->>User: ConstraintType Enum

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PR metadata mismatch

This PR is described as exporting ConstraintType/InequalityOperator from config/__init__.py, but this commit only changes AGENTS.md (and even git show for the head SHA lists only AGENTS.md). If this is the intended PR content, please update the PR title/description and changed-files list; otherwise, the actual code change for packages/data-designer-config/src/data_designer/config/__init__.py is missing from the head commit(s) and needs to be included before merge.

Prompt To Fix With AI

This is a comment left during a code review.
Path: AGENTS.md
Line: 507:509

Comment:
**PR metadata mismatch**

This PR is described as exporting `ConstraintType`/`InequalityOperator` from `config/__init__.py`, but this commit only changes `AGENTS.md` (and even `git show` for the head SHA lists only `AGENTS.md`). If this is the intended PR content, please update the PR title/description and changed-files list; otherwise, the actual code change for `packages/data-designer-config/src/data_designer/config/__init__.py` is missing from the head commit(s) and needs to be included before merge.

How can I resolve this? If you propose a fix, please make it concise.