@workit/core 0.3.0

Add the @workit/core/time-policy planning subpath for declared async time policy analysis. The root import remains unchanged.

• Add planTimePolicy() for conservative upper-bound planning across attempt, series, parallel, retry, hedge, timeout, and deadline policy trees.
• Add estimateRetry() and estimateHedge() helper planners aligned with the runtime retry delay and hedge stagger contracts.
• Add bounded correctness evidence for retry/deadline planning, the finite time-policy cost model, and nested composition rules.
• Add package-consumer coverage for the new subpath across ESM, CommonJS, and strict TypeScript fixtures.
• Document that the planner analyzes declared policy bounds before execution; it does not run task bodies or prove wall-clock scheduler behavior.

Validation before publish:

• PR #51 CI passed: package verify, site build, CodeQL.
• Release Provenance dry run passed.
• Release Provenance publish passed with npm provenance.