feat(core): add kinetic envelope conformance runner

[pshkv]

Summary

• add exported kinetic-envelope types and receipt/result schemas in @pshkv/core
• widen SintRequest.physicalContext and its schema for kinetic sensing fields from the spec seed
• add a conformance runner over spec/kinetic-envelope/conformance/ros2-reference-v0.1.json
• include the kinetic runner in @pshkv/conformance-tests fixture suite

Non-goals

• no gateway behavior change
• no assignTier wiring
• no normative A/E formula beyond the reference runner for published vectors

Validation

• pnpm --filter @pshkv/core typecheck
• pnpm --filter @pshkv/core build
• pnpm --filter @pshkv/conformance-tests test -- src/kinetic-envelope-conformance.test.ts
• pnpm --filter @pshkv/core test
• pnpm --filter @pshkv/conformance-tests test:fixtures
• git diff --check

Closes #244.