Add allowlist-based artifact discovery over the conventional CE locations
(STRATEGY.md, docs/ideation, docs/brainstorms, docs/plans, docs/solutions,
CONCEPTS.md), grouped by stage, with error entries for unreadable artifacts and
no reads outside the allowlist. Add list/read/preview routes (self-contained
sandboxed HTML, data-section markers) and the primary CompoundEngineeringView
with explicit empty/partial/error states, viewport-gated fetch, and a short-TTL
cache. Bind the view via registerBundledPluginViews + dashboard workspace dep
(the real binding; manifest componentPath is cosmetic).
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