[APPS][Connections Part 8] Trace imported connection ID values

[sdkennedy2]

Motivation

Allow backend helper modules discovered by the reachable module graph pass to keep static connection IDs in separate local modules.

Changes

This PR adds graph-aware imported value tracing on top of the module graph traversal refactor. Module records now include the import/export metadata needed for value semantics, and connection ID resolution can follow named imports, local export aliases, re-exports, import/export relays, and unambiguous export * declarations back to static values.

Supported values include imported string constants, static template literals, const chains, and static object roots such as:

import { CONNECTIONS } from './connections';
request({ connectionId: CONNECTIONS.HTTP.PROD, inputs: {} });

The resolver still fails closed for unsupported graph/value shapes including default imports, namespace imports, missing exports, mutable exports, ambiguous star exports, and import/export cycles.

QA Instructions

• yarn workspace @dd/apps-plugin typecheck
• yarn eslint packages/plugins/apps/src/backend/ast-parsing/module-graph.ts packages/plugins/apps/src/backend/ast-parsing/walk-module-graph.ts packages/plugins/apps/src/backend/ast-parsing/extract-connection-ids-from-module-graph.ts packages/plugins/apps/src/backend/ast-parsing/extract-connection-ids-from-module-graph.test.ts packages/plugins/apps/src/backend/ast-parsing/connection-id-values.ts packages/plugins/apps/src/vite/backend-connection-id-collector.ts --quiet
• yarn workspace @dd/tests test:unit packages/plugins/apps/src/backend/ast-parsing/extract-connection-ids-from-module-graph.test.ts packages/plugins/apps/src/backend/ast-parsing/extract-connection-ids.test.ts packages/plugins/apps/src/vite/dev-server.test.ts packages/plugins/apps/src/vite/index.test.ts packages/plugins/apps/src/index.test.ts --runInBand

Blast Radius

This affects apps plugin backend connection ID analysis for reachable backend modules. It broadens static analysis support for local imported values while preserving fail-closed behavior for unsupported cases.

Documentation

• PR Description Guidelines

[sdkennedy2]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• [APPS][Connections Part 8] Trace imported connection ID values #363 👈 (View in Graphite)
• [APPS][Connections Part 7] Traverse backend module graph for connection IDs #362
• [APPS][Connections Part 6] Build backend module graph during backend builds #353
• [APPS][Connections Part 5] Move apps Vite behavior into getVitePlugin #357
• [APPS][Connections Part 4] Resolve same-module connection ID object values #354
• [APPS][Connections Part 3] Resolve same-module connection ID constants #351
• master

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