Development Kit v0.12.0

What's Changed

• fix(release): extend npm verification retry window to tolerate slow registry propagation by @eybersjp in #58
• release(v0.12): ship stable-state features, defer T04 to v0.13 by @eybersjp in #83
• analysis: DKF Scale, Context & Iteration Phase 0-1 baseline by @eybersjp in #59
• feat(v0.12): DKF120-T01 Cost Observatory validation by @eybersjp in #61
• feat(v0.12): DKF120-T03 Execution Capsules validation by @eybersjp in #65
• feat(v0.12): DKF120-T02 Workspace Target Engine validation by @eybersjp in #63

Full Changelog: v0.11.2...v0.12.0