chore(voyage): S34 — V30 economy-profile self-declares experimental (uncalibrated Jaccard floor)

The economy profile's cross-tier Jaccard floor (0.55) rests on parked-synthetic
fixtures; empirical Step-17 calibration is v4.2-budget-gated ($60–120,
unauthorized). Fork resolved as label-not-calibrate: the experimental status,
previously prose-only in docs/profiles.md, now lives in the profile data and is
machine-checked. No new user-facing capability — honest labeling + a guard.

- lib/profiles/economy.yaml: add `experimental: true` (with rationale comment).
- lib/validators/profile-validator.mjs: recognize `experimental` as an OPTIONAL
  boolean; non-boolean → PROFILE_INVALID_ENUM. Absent ⇒ tier is stable
  (premium/balanced unaffected, profile_version stays 1.0 — additive).
- README.md + docs/operations.md + docs/profiles.md: flag the `economy` table
  row "⚠ Experimental (uncalibrated Jaccard floor)".
- tests/synthetic/profile-jaccard-calibration.md + analysis §6/§10 + backlog
  plan §S34: cross-reference the marker; mark V30/S34 done.

+5 tests (739 → 744, 742/2/0): economy declares experimental:true; premium and
balanced do not; validator rejects non-boolean experimental; every profile-doc
economy row is flagged; the flag tracks the calibration's parked-synthetic
status (must drop in the same change that lands real calibration).

Closes the balance backlog (4/4, S31–S34). claude plugin validate green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LqBYc8Ltrk7LipyJmGxXiB

docs/voyage-vs-cc-balance-analysis.md

@@ -158,7 +158,7 @@ All items are **operator-gated** (scope-guard: analysis only). Tagged **[non-bre
 
 ### Tier 3 — surfaced risks (no action mandated)
 
-7. **[non-breaking][pinned]** **V30** — the `economy` profile's Jaccard floor (0.55) is grounded in parked synthetic fixtures (Step 17 calibration deferred). It is self-declared experimental; either calibrate or label clearly.
+7. **[non-breaking][pinned]** **V30** — the `economy` profile's Jaccard floor (0.55) is grounded in parked synthetic fixtures (Step 17 calibration deferred). It is self-declared experimental; either calibrate or label clearly. → **RESOLVED (S34): label, not calibrate.** Empirical calibration is v4.2-budget-gated ($60–120, unauthorized); instead `lib/profiles/economy.yaml` now carries `experimental: true` (validator type-checks it) and every profile doc flags the `economy` row. Pinned in `profile-validator.test.mjs` + `doc-consistency.test.mjs` — the flag must track the calibration's `parked-synthetic` status.
 8. **[non-breaking]** **V01** — minor: delegate the literal Q&A turn-taking to AskUserQuestion rather than a hand-rolled selection loop (internal hygiene; does not change the framing-gate or reviewer contract).
 
 ### Explicitly NOT recommended
@@ -221,6 +221,16 @@ workflow and are not spawned as sub-agents. Of the 21 spawnable, one —
 `docs/T1-synthesis-poc-results.md`). Reconciled across `README.md`,
 `CLAUDE.md`, and this doc; pinned in `tests/lib/doc-consistency.test.mjs` (S33).
 
+**V30 outcome (S34, the lone Tier-3 code item).** The economy-calibration fork
+also resolved conservatively: **label, do not calibrate.** The empirical run is
+v4.2-budget-gated ($60–120, unauthorized) and was never in scope here. Instead
+`economy`'s experimental status — previously prose-only in `docs/profiles.md` —
+now lives in the profile **data** (`lib/profiles/economy.yaml experimental: true`,
+type-checked by the profile-validator) and on every profile-doc `economy` row,
+pinned so the flag tracks the calibration's `parked-synthetic` status and is
+dropped in the same change that lands real calibration. This closes the backlog:
+all 8 §6 items disposed across S31–S34 (2 code: V15+V30; the rest doc/audit).
+
 **Still explicitly NOT done** (out of scope, per the plan): no `gemini-bridge`
 removal (D1), no exporter deletion (D2), no model downgrade (D3), no Handover-1
 change, no Workflow substrate swap (CC-27 declined), no delegated-orchestration