Integration hub: extends integration.models with fields needed by the wizard
(capabilities, credentials, readiness), updates the shell and list components,
adds routing for the new hub flow, and broadens the integration-list spec.
Integration wizard: new integrations-hub.component, extended wizard with
capability/credential handling, updated template + type models, and broader
spec coverage.
Sprint docs: SPRINT_20260413_003 (UI-driven local setup rerun) updated with
wiring notes; SPRINT_20260410_001 (no-mocks) adjusted. ReleaseOrchestrator
architecture doc gets a minor clarification.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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