docs(agentic-ci): fix stale generator class name in engine.md

[github-actions]

Summary

architecture/engine.md referenced a generator class LLMTextColumnGenerator
that no longer exists in the engine package. The concrete generator was renamed
to LLMTextCellGenerator
(packages/data-designer-engine/src/data_designer/engine/column_generators/generators/llm_completion.py:150).

This updates the single stale reference on line 60 so the orientation doc
matches the source. The sibling reference in the same sentence
(SamplerColumnGenerator) was verified to still exist and is left unchanged.

Verification

• rg "LLMTextColumnGenerator" packages/*/src/ → no matches (class is gone).
• rg "class LLMTextCellGenerator" packages/*/src/ → single match at the
  stated location, same role.

This is a docs-only, single-line change generated by the daily
docs-and-references audit.

🤖 Generated with Claude Code

[greptile-apps]

Greptile Summary

This PR corrects a stale class name in architecture/engine.md, updating LLMTextColumnGenerator to LLMTextCellGenerator to match the current source.

• The old name no longer exists anywhere in the codebase; LLMTextCellGenerator is confirmed at packages/data-designer-engine/src/data_designer/engine/column_generators/generators/llm_completion.py.
• The sibling reference to SamplerColumnGenerator in the same sentence is still valid and is left untouched.

Confidence Score: 5/5

Documentation-only change replacing a stale class name with the correct one, verified against live source.

The single-line edit corrects a class name in a markdown doc. The old name (LLMTextColumnGenerator) is absent from the entire codebase; the new name (LLMTextCellGenerator) is confirmed in the source. No logic, config, or runtime behavior is touched.

No files require special attention.

Important Files Changed

Filename	Overview
architecture/engine.md	Single-line doc fix: replaces stale class name LLMTextColumnGenerator with the current LLMTextCellGenerator, verified against the live source.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A["architecture/engine.md\n(docs)"] -->|"references"| B["SamplerColumnGenerator\n✅ exists in source"]
    A -->|"used to reference"| C["LLMTextColumnGenerator\n❌ no longer exists"]
    A -->|"now references"| D["LLMTextCellGenerator\n✅ exists in source\n(llm_completion.py:150)"]

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%%{init: {'theme': 'base', 'themeVariables': {"darkMode": true, "background": "#0d1117", "primaryColor": "#21262d", "primaryTextColor": "#e6edf3", "primaryBorderColor": "#8b949e", "lineColor": "#8b949e", "textColor": "#e6edf3", "edgeLabelBackground": "#161b22", "actorBkg": "#21262d", "actorBorder": "#8b949e", "actorTextColor": "#e6edf3", "actorLineColor": "#8b949e", "signalColor": "#8b949e", "signalTextColor": "#e6edf3", "noteBkgColor": "#373320", "noteBorderColor": "#d4a72c", "noteTextColor": "#f0e6c0", "labelBoxBkgColor": "#21262d", "labelBoxBorderColor": "#8b949e", "labelTextColor": "#e6edf3", "loopTextColor": "#e6edf3", "activationBkgColor": "#30363d", "activationBorderColor": "#8b949e"}}}%%
flowchart TD
    A["architecture/engine.md\n(docs)"] -->|"references"| B["SamplerColumnGenerator\n✅ exists in source"]
    A -->|"used to reference"| C["LLMTextColumnGenerator\n❌ no longer exists"]
    A -->|"now references"| D["LLMTextCellGenerator\n✅ exists in source\n(llm_completion.py:150)"]

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_{Reviews (2): Last reviewed commit: "chore: trigger PR checks" | Re-trigger Greptile}

[andreatgretel]

/authorize-agentic-ci