feat(compiler): establish SLP-0002 local shared ownership

[julia-script]

Summary

• audit and repair all six SLP-0002 OpenSpec handoff changes to the Ready bar
• implement the sealed Intrinsic.SharedCore<T> identity, execution-affinity facts, and structural local-shared ownership obligations
• propagate local ownership through generic specialization, executable captures, moves, and suspension frames
• add focused diagnostics, ownership tests, deterministic goldens, public exports, and release-candidate coverage
• record the bounded SLP-5 outcome and the resume point for the remaining DAG

Scope

This PR contains the completed and integration-verified layer 1. Layer 2 reached its bounded gate limit and remains unmerged on a separate preserved branch; layers 3-6 remain dependency-parked.

Validation

• pnpm typecheck
• pnpm exec biome check .
• pnpm test
• pnpm check
• pnpm release:candidate

All integration gates passed after the layer-1 merge, including release-candidate validation 9/9. The required three-lens conformance pass found no unresolved Critical or High issues.