docs: cleanup roadmap from CEO bloat audit

[Gradata]

Codex/gpt-5.5 audit. 7 sections, 4 PR plan. Reference doc, no code changes.

[coderabbitai]

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📝 Walkthrough

• Adds comprehensive CLEANUP_ROADMAP.md documentation outlining architectural cleanup priorities identified in a system audit
• Documents 6 confirmed redundancies: graduation spines, scoring metrics, synthesizer modules, behavioral registries, session histories, and deprecated integrations namespace
• Identifies 5 production files exceeding 500 lines flagged for refactoring
• Lists 4 dead-code candidates verified with grep analysis
• Proposes splitting the "brain" god-object into smaller, more maintainable components
• Provides ordered 4-PR cleanup roadmap: naming conventions → integrations cleanup → graduation module → brain split
• Includes ROI/risk analysis for top 10 cleanup actions
• Documentation-only; no code changes or public API modifications

Walkthrough

This PR adds a comprehensive cleanup roadmap document (CLEANUP_ROADMAP.md) that outlines a multi-PR strategy for the Gradata codebase. It catalogs redundancies, architectural refactoring proposals, dead-code candidates, import relocation guidance, and prioritized cleanup phases with verification steps.

Changes

Documentation Cleanup Roadmap

Layer / File(s)	Summary
Cleanup Planning & Architecture Gradata/docs/CLEANUP_ROADMAP.md	New multi-section roadmap document detailing seven major areas: redundancy analysis, architectural split proposals, large file considerations, dead-code candidates, import relocation guidance, ROI-based cleanup prioritization, and a structured multi-PR implementation plan with test/verification notes.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Suggested labels

docs

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately reflects the main change: it's a documentation addition of a cleanup roadmap document resulting from a CEO bloat audit.
Description check	✅ Passed	The description is related to the changeset, providing context about the audit source (Codex/gpt-5.5), the structure (7 sections), and clarifying it contains no code changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/cleanup-roadmap

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