Document minimal vs full stack in docs/LOCAL_DEV.md

[askmy-stack]

Background

Identified during OSS audit v2 of cortex.

Problem Statement

Heavy infra friction.

Proposed Solution

Neo4j-only quick path.

Acceptance Criteria

• Implementation complete
• Tests pass
• Documented in README or docs/

Files / Modules Affected

docs/LOCAL_DEV.md

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Suggested labels: priority:medium, difficulty:intermediate, category:documentation
Milestone: v2.0-features
OSS Audit: Master Backlog v2