remove scoreboard builder, related data files, and metrics module

Author: allnes

scoreboard/README.md

@@ -3,6 +3,12 @@
 Static HTML generator for the course scoreboard. All calculations happen in Python; a small bundled JS
 snippet is used only for client-side variant calculation.
 
+Key modules (object-oriented):
+
+- `scoreboard.py` — aggregates tasks/students, builds rows, exposes deadlines/variants.
+- `tasks.py` — domain model for `Task` with concrete `ThreadTask`/`ProcessTask` and scoring rules.
+- `student.py` — student entity holding submissions and caching computed scores.
+
 ## Usage
 
 ```bash
@@ -14,9 +20,9 @@ Generated files: `index.html`, `threads.html`, `processes.html` and optional per
 
 ## Configuration
 
-- `data/points-info.yml` — max points, variants, performance scale
-- `data/deadlines.yml` — deadline offsets/labels for display and penalty
-- `data/copying.yml` — flagged submissions per task (with coefficient in `points-info.yml`)
+- `data/points-info.json` — max points, variants, performance scale
+- `data/deadlines.json` — deadline offsets/labels for display and penalty
+- `data/copying.json` — flagged submissions per task (with coefficient in `points-info.json`)
 
 ## Testing
 
@@ -28,5 +34,5 @@ pytest -v
 ## Notes
 
 - Threads deadlines are auto-distributed across 1 Feb → 15 May; processes across 15 Oct → 14 Dec, with
-  per-task shifts from `deadlines.yml`.
+  per-task shifts from `deadlines.json`.
 - CSS is bundled locally (no CDN); HTML pages remain self-contained, with JS limited to the variant calculator.