v0.17.0 — context-drift hardening for large projects

Added

• New context-discipline skill — enforces orchestrator no-raw-read thresholds, phase-boundary compaction, and tiered additive-only AGENTS.md generation.
• Handoff-grade Decision log schema — replaces one-line entries with four required fields: Decision, Why, Constraint for later tasks, and Contracts touched.
• Command integration across Phases 2, 4, and 5 — loads context discipline throughout planning, execution, and review, including explicit sequential-vs-parallel boundary rules.
• tests/flowDocs.test.ts structure guard — validates the command and skill documentation contracts and keeps the command mirror byte-identical.