packages/fal-nodes: verify, test, and fix — 1 smoke test for 29 files

[georgi]

Package: packages/fal-nodes

Description: FAL AI service nodes for image/video/audio generation.

Current State

• Source files: 29 (26 generated, 3 manual: fal-base.ts, fal-provider.ts, fal-dynamic.ts)
• Test files: 1 (3.4% coverage ratio — single smoke test)
• Known issues: Generated nodes almost entirely untested

Tasks

• Review fal-base.ts, fal-provider.ts, fal-dynamic.ts for placeholder/stub code
• Add tests for FAL provider (API key handling, request/response)
• Add tests for fal-base (submit/poll/download lifecycle)
• Add smoke tests for generated node definitions
• Run full test suite, fix any failures
• Verify dynamic node creation works correctly

Acceptance Criteria

• All tests pass
• Core FAL logic (base, provider, dynamic) has test coverage
• No placeholder code in manual source files