feat(statistics): store ranked_score & total_score under classic scoring mode (#68)

* Initial plan

* feat(calculator): add classic score simulator and scoring mode support

- Add ScoringMode enum with STANDARDISED and CLASSIC modes
- Add scoring_mode configuration to game settings
- Implement GetDisplayScore function in calculator.py
- Add get_display_score method to Score model
- Update score statistics to use display scores based on scoring mode

Co-authored-by: MingxuanGame <68982190+MingxuanGame@users.noreply.github.com>

* fix(calculator): apply scoring mode to TotalScoreBestScore delete method

- Update delete method to use display score for consistency
- Ensures all UserStatistics modifications use configured scoring mode

Co-authored-by: MingxuanGame <68982190+MingxuanGame@users.noreply.github.com>

* refactor(calculator): address code review feedback

- Move MAX_SCORE constant to app/const.py
- Implement is_basic() as method in HitResult enum
- Move imports to top of file in Score model
- Revert TotalScoreBestScore storage to use standardised score
- Apply display score calculation in tools/recalculate.py
- Keep display score usage in UserStatistics modifications

Co-authored-by: MingxuanGame <68982190+MingxuanGame@users.noreply.github.com>

* chore(linter): auto fix by pre-commit hooks

* Don't use forward-ref for `ScoringMode`

* chore(linter): auto fix by pre-commit hooks

* fix(calculator): update HitResult usage in get_display_score and adjust ruleset value in PerformanceServerPerformanceCalculator

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: MingxuanGame <MingxuanGame@outlook.com>

app/models/scoring_mode.py

@@ -0,0 +1,13 @@
+from enum import Enum
+
+
+class ScoringMode(str, Enum):
+    """
+    Scoring mode for calculating scores.
+
+    STANDARDISED: Modern scoring mode used in current osu!lazer
+    CLASSIC: Legacy scoring mode for backward compatibility
+    """
+
+    STANDARDISED = "standardised"
+    CLASSIC = "classic"