Make repository scope rendering declarative

[Copilot]

The repository scope view was implemented as page-specific JavaScript. This change moves its composition into Dashboard Language configuration and normalized JSON data.

Changes

• Declarative view
  • Replaces repository-scope with the reusable context-summary element.
  • Preserves repository navigation and telemetry state coverage.

{
  "data": {
    "sources": ["repository-summary", "repositories", "runs", "usage", "operational-values"]
  },
  "mark": "element",
  "element": "context-summary"
}

• Data model

  • Derives repository scope, run-window, and AIC coverage rows in repository-data.js.
  • Registers the new logical source and fields in the language vocabulary.

• Renderer cleanup

  • Removes the repository-specific component and browser module wiring.
  • Generalizes the existing scope layout for reusable context summaries.

[pelikhan]

@copilot resolve the merge conflicts on this branch.

[Copilot]

@copilot resolve the merge conflicts on this branch.

Resolved the conflicts by merging the latest main in commit 53dc504. Preserved both the declarative context summary and the new coverage diagnostics changes; dashboard unit tests, e2e tests, lint, typecheck, build, and CodeQL all pass.