P3-32 Remove Unity/CoreSim namespace collisions

[Kinin-Code-Offical]

(Synced from docs/current_status/issue_ready_backlog.md)\n\n# P3-32 Remove Unity/CoreSim namespace collisions\n\nSummary

• Area: Unity/CoreSim packaging
• Deliverable: avoid collisions; assembly definitions.

Acceptance Criteria

• No duplicate namespaces/types causing ambiguity.
• Unity builds cleanly.

Test Plan

• Unity build/compile verification.

Likely File Targets

• Unity assemblies/asmdef + packaging

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[github-actions]

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