Unknown Duration Progress Bar shared parity manifest

Compiler-UI.ps1 SHA-256: 0a0dc53c4c2a6283f1fb0ca44389adb0d86915837a0e3a36817704be832b697e
progress.unknownDuration canonical JSON SHA-256: 7dfeb4733b1454fb8e70d87dccbd7f73b034eab9275f4b36d5cd909ab566ff65

Contract:
- Stage 1: 0..97 -> 0..30; 97..100 -> 30..100.
- Stage 2: remaining 30..97 -> 30..60; 97..100 -> 60..100.
- Stage 3: remaining 60..100 is identity/as-is.
- Stages are evaluated sequentially; each stage consumes the previous stage output.
- Renderer and this progress data contract must remain byte-for-byte equivalent between PHLEGM and Mindrealm.
