Add game data, art, constants and game logic

Add the assignment data set (50 accounts), the logo and vs art, the
constants module, and the pure functions get_random_account,
pick_pair, format_data and check_answer, all with Doxygen comments.
pick_pair never returns the same account twice; check_answer accepts
either choice on a tie. Cover them with pytest tests (22 passing).

The art is built from concatenated raw lines so the backslashes survive
and Doxygen does not read the backticks as markup.

Accept MIL-002 after review RC-005 and add it to the Traceability
Matrix.

Task: MIL-002#1
Task: MIL-002#2
Task: MIL-002#3
Task: MIL-002#4
Task: MIL-002#5
Task: MIL-002#6
Closes #6
Closes #7
Closes #8
Closes #9
Closes #10
Closes #11

docs/sqa/traceability-matrix.md

@@ -10,6 +10,7 @@
 | Date | Status | Author | Reviewer | Change | Commit |
 | --- | --- | --- | --- | --- | --- |
 | 2026-10-04 | Proposed | Jens Tirsvad Nielsen | S01 | Initial version | [a1ff735] |
+| 2026-10-04 | Proposed | Jens Tirsvad Nielsen | S01 | Added RC-005 review of MIL-002 | pending |
 
 ---
 
@@ -26,7 +27,7 @@ target is measurable. A row is added or updated whenever an artifact instance is
 | [SA-001] | SA | [BC-001] | [PP-001] | [RC-002] |
 | [PP-001] | PP | [BC-001], [SA-001] | [MIL-001], [MIL-002], [MIL-003], [MIL-004] | [RC-003] |
 | [MIL-001] | MIL | [BC-001], [PP-001] | - | [RC-004] |
-| [MIL-002] | MIL | [BC-001], [PP-001] | - | - |
+| [MIL-002] | MIL | [BC-001], [PP-001], [MIL-001] | - | [RC-005] |
 | [MIL-003] | MIL | [BC-001], [PP-001] | - | - |
 | [MIL-004] | MIL | [BC-001], [PP-001] | - | - |
 
@@ -49,3 +50,4 @@ target is measurable. A row is added or updated whenever an artifact instance is
 [RC-003]: ./reviews/rc-003-project-plan.md
 [RC-004]: ./reviews/rc-004-mil-001.md
 [a1ff735]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/a1ff73580fdcfad5bbb3854298fdfa0c16ada853
+[RC-005]: ./reviews/rc-005-mil-002.md