Add capability discovery packaging sprint

[lishehao]

Summary

• Add a conservative instrument capability registry for the currently supported AWG/oscilloscope models only, plus test-only mock profiles.
• Add an explicit adapter registry/factory layer so model selection is decoupled from adapter construction without broadly rewriting the legacy equips.py path.
• Add a safe, mockable resource scan and *IDN? test-connect service, with Tk operator-console controls/status updates.
• Add a Windows PyInstaller one-folder packaging spike with prerequisites, runtime-path notes, and no-hardware smoke checklist.

Validation

• PYTHONPATH=src python -m unittest discover -s tests (62 tests)
• git diff --check
• git diff HEAD~1 --check
• python -m py_compile src/app/domain/instrument_capabilities.py src/app/application/services/instrument_discovery.py src/app/infrastructure/instruments/adapter_registry.py src/app/infrastructure/instruments/identity_probe.py src/app/infrastructure/instruments/mock_adapters.py src/app/infrastructure/instruments/equips_factory.py src/app/presentation/tk/controller.py packaging/pyinstaller/auto_load_off_test_onefolder.spec
• Tk smoke checked earlier in this branch: AppWindow opens and exposes Scan Resources / Test Connect controls.

Honesty Boundary

• No new real hardware models are added.
• Mock/fixture/demo paths remain hardware-free and are not claimed as live hardware validation.
• Production AWG/oscilloscope adapters remain the existing supported paths; live hardware and packaged builds still require bench validation plus VISA/driver prerequisites.