feat: ship Voice Workbench and executable narratives

[0xjcf]

What changed

• adds the actor-backed Voice Workbench example with deterministic domain, policy, capability, projection, voice, speech, and failure-recovery contracts
• adds executable multi-step igniteTest(...).narrative(...) evidence while preserving record() and snapshotStory() as observed Story APIs
• dogfoods named failure and recovery narratives through Voice Workbench
• documents the Story/narrative authority boundary and retained-interface patterns
• hardens the beta release wrapper so all four lockstep packages repair and verify the beta dist-tag without moving ignite-element@latest

Why

This closes the behavior-first/narrative epic with executable evidence: narratives state expected user experience, state machines remain authoritative, and Stories capture observed execution receipts.

Impact

The beta line gains the Voice Workbench reference implementation, the executable narrative testing surface, clarified Story vocabulary, and a recoverable beta release path. This PR does not publish packages; beta.9 is cut from the exact merged beta head.

Verification

• fas verify --full — format, lint, typecheck, tests, architecture drift, behavior boundaries, and semantic index all passed
• pnpm release:beta --dry-run — all 13 pending changesets plan the four packages from beta.8 to beta.9 without versioning or publishing
• pre-push full package/example test lane passed, including Voice Workbench narrative dogfood

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.16%. Comparing base (2f86faa) to head (03f4e93).
⚠️ Report is 21 commits behind head on beta.

Additional details and impacted files

@@            Coverage Diff             @@
##             beta      #94      +/-   ##
==========================================
- Coverage   91.25%   90.16%   -1.10%     
==========================================
  Files          33       38       +5     
  Lines        1830     3181    +1351     
  Branches      498      948     +450     
==========================================
+ Hits         1670     2868    +1198     
- Misses        150      290     +140     
- Partials       10       23      +13     

Flag	Coverage Δ
unittests	90.16% <ø> (-1.10%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...ackages/ignite-element/src/IgniteElementFactory.ts	95.49% <ø> (-1.90%)	⬇️
packages/ignite-element/src/testing.ts	77.89% <ø> (+3.45%)	⬆️

... and 11 files with indirect coverage changes

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