v2.0.0

Major Changes

• 056559e: Make Effect 4 the default policy for plugin presets and version-sensitive rules.
  This is a breaking configuration change: Effect 3 projects must select the
  effect3 namespace or set effectVersion: 3 on manually configured sensitive
  rules. Existing rule IDs and the single linteffect plugin registration remain.

  Add version-specific recovery, generator, callback and behaviour-decoration
  recognition, with annotated failing examples, clean repairs and packed consumer
  contracts for both Effect majors. Keep removed Effect 3 APIs in the legacy
  presets rather than default Effect 4 presets. Type-aware presets remain opt-in.

  Add exhaustive current and legacy lint/type/runtime-contract corpora, all group
  and rules-only composition checks, version-selected packaged agent-skill assets
  and a conjunctive group release guard. Legacy-only policies include service
  accessors/dependencies, Effect.async, orElse ladders and Runtime.runFork; current
  manual configuration remains inactive for those removed APIs. Preserve stable
  rule IDs and explicit syntax-local limits, including import, alias and ownership
  gaps. Correct current envelope recovery and schema data-constructor guidance.
  Cover current eager mapping/sequencing callbacks and behaviour pipes. Correct
  failure repairs to delegate in generators or return Effects from flatMap, rather
  than accidentally treating an Effect as a successful map/return value.

  This changeset stages the major release; it does not establish release readiness.
  The exhaustive qualification and release gates must pass before publication.