Convert runtime triage to declarative signals

[Copilot]

Runtime triage used a dedicated JavaScript renderer rather than the dashboard’s declarative specification, data, and reusable-element model.

Changes

• Declarative specification

  • Defines runtime-signals in the source schema.
  • Configures Runtime triage to use the shared signal-list element.

• Data derivation

  • Moves signal ranking, evidence boundaries, and navigation targets into a JSON-shaped logical source.
  • Shares execution-model derivation with the remaining episode renderer.

• Reusable UI

  • Removes the specialized execution-signal-list renderer.
  • Adds safe fragment navigation to generic signal rows.
  • Preserves failure, approval, attribution-gap, and anomaly-baseline context.