ready-suite 3.0.1

Patch release across all eleven skills, the meta plugin, and marketplace metadata. A whole-suite markdown drift audit, the fixes it surfaced, and three new lint checks that make previously-unenforced invariants mechanical.

Fixed

• stack-ready frontmatter restored the suite, tier, upstream, downstream keys it was missing, so all eleven skills satisfy the documented frontmatter contract.
• Stack-decision artifact canonicalized to .stack-ready/DECISION.md everywhere (production-ready, roadmap-ready, and the worked example had used a non-existent .stack-ready/STACK.md).
• harden-ready added to the shipping-tier list in the 7 specialist skills that omitted it.
• production-ready reference table now indexes all 39 reference files (14 deep-dives were shipped but unreachable from the load-on-demand table).
• README describes the linter's real unicode-clean scope, lists all ten checks, and no longer implies install.sh covers Windsurf (manual-install).
• MAINTAINING.md / PLUGIN-RESEARCH.md updated for the unified release train (ten checks, four rituals).
• bump-suite-version.sh changelog template is bump-type-aware and updates the README badges.

Added (lint: seven checks to ten)

• frontmatter-schema: every skill declares the required frontmatter keys.
• doc-version-tables: README and SUITE version tables match root VERSION.
• references-indexed: every references/*.md is named in its SKILL.md.

Full diff: v3.0.0...v3.0.1