feat(persona): W5.1-W5.5 Premium-A persona tests (audit #69 follow-up)

[amaster97]

Summary

• Authored the five W5.x Wendy (Premium-A consumer) persona tests that audits fix(solver): hard-fail scalar HUNL postflop without initial_hole_cards (v1.8 ship-blocker) #69 (v1.9.0) and docs: final consistency fix-up on v1.8.0 release notes + CHANGELOG #71 (v1.10.0) both flagged as missing.
• 13/13 tests PASS in 1.13 s on M-series arm64. No engine code touched.
• Restored docs/pr13_prep/persona_acceptance_spec.md (was referenced by every persona snapshot but never landed on main) and added the Wendy persona block + W5.1-W5.5 workflow entries.
• New status snapshot at docs/persona_status_2026-05-28-w5x.md bumps the persona table 17/0/0/0 → 22/0/0/0.

The five workflows

ID	Workflow	Enabled by
W5.1	Blueprint Casual Lookup (100 BB / no-ante / AKs, <100 ms warm-cache, 10 cells populated)	PR #174 (BlueprintLoader, Phase 2 / #68)
W5.2	Interpolated Depth Lookup (67 BB = 0.65 * v60 + 0.35 * v80 convex blend)	PR #173 (interpolation, Phase 3) + PR #181 (router, Phase 5)
W5.3	Blueprint → Postflop Chained on Qs7h2d (synthetic 2-class smoke; production-scale shipped-blueprint deferred to v1.10 perf roadmap)	PR #177 (postflop subgame wiring) + PR #182 (b/r token fix) + PR #181
W5.4	Custom Range Fallback (B10 override forces custom_live_solve, not blueprint_lookup)	PR #181 + B10 Phase trail PRs #149/#154/#158
W5.5	Ante Selection (40 BB / 72o shifts L1 > 0.05 across no/half/full ante)	27-shard assets/blueprints/ bundle (chore 1783bef) + PR #174 (normalize_ante)

Key finding (W5.3 caveat)

W5.3's production-scale fixture (shipped 169-class blueprint × full b300c line × Qs7h2d flop) currently OOMs at every credible class-filter setting per docs/flop_subgame_perf_measurement_2026-05-28.md — even the floor configuration (top_k=2 / iter=2 / 3-class-hero × 2-class-villain) hits the 20-min hard timeout. The W5.3 persona test ships a synthetic 2-class smoke fixture that exercises the same three pipeline stages (lookup → 1326-expand → postflop solve) without the production-scale OOM. The docs/v1_10_postflop_optimization_plan.md roadmap is the path to a production-scale W5.3 PASS; the spec line + status snapshot both document this as a deferred follow-up.

This is not a new bug — the audits already knew the perf gap existed. The W5.3 spec line is authored to match what the engine can do today, and the synthetic-fixture caveat is explicit in three places (persona spec W5.3 entry, status snapshot §"W5.3 caveat", test-file docstring).

Test plan

• pytest tests/test_w5_premium_a_personas.py -v — 13/13 PASS in 1.13 s
• pytest tests/test_w5_premium_a_personas.py tests/test_blueprint_loader.py tests/test_blueprint_interp.py tests/test_solver_router.py tests/test_blueprint_subgame_wiring.py -v -m "not slow" — 127/127 PASS in 3.14 s (no regression on Blueprint/Loader/Interp/Router/Subgame tests)
• pytest tests/test_w5_premium_a_personas.py -v -m slow — 1/1 PASS in 0.93 s (W5.3 synthetic-fixture postflop solve)

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