v1.8.0 — Project Status dashboard tools

New tools (reports group)

• project_subtask_hours — delivery/allocated/effective hours from sub-tasks, with closed-stage + single-assignee filters and optional by-month grouping.
• project_dashboard — one-call detail page: core (project, milestones, finance, weekly logged), hours, budgets, budget_detail, delivery_monthly; per-section soft-fail via the errors key, section picking via include.
• portfolio_health — one-call overview of every active project with derived health verdicts and budget burn %.

Shared infrastructure

• project_shared.py: budget-model abstraction, derive_project_health (single source of truth for health verdicts), analytic_money positive-cost convention, paged_search_read, periods_domain, sub-task fetch/filter/aggregate helpers.

Hardening (11-finding review pass)

• Unknown budget_ids warn for every budget-consuming section; _budget_context failure lands on every requested budget section — a requested section never vanishes silently.
• portfolio_health degrades instead of hard-failing on milestone errors; core's finance/weekly_logged soft-fail independently.
• Strict _parse_ymd date validation (rejects trailing garbage, normalises whitespace).
• Perf: sub-tasks fetched once for hours + delivery_monthly; core's project row reused by _budget_context.

451 tests green. Live-verified against production baseline (The Body Shop, project 59) on 2026-07-17: planned 1,593,314,320 / practical 1,736,086,746, full dashboard load 13.2s, zero errors.