Properly recalculate compatible mods on stability tolerance change

[HebaruSan]

Problem

1. Open CKAN with the default stability settings (stable only)
2. Find RasterPropMonitor-Core
3. Note that the relationships are for 1.0.2
4. In the Versions tab, note there's a 1.0.3 prerelease
5. Set a stability override of Testing for this mod
6. Everything refreshes and 1.0.3 now shows up as installable
7. However, the Relationships tab still shows the relationships for 1.0.2

Pointed out by @JonnyOThan in Discord.

Cause

CompatibilitySorter retains a readonly reference to the StabilityToleranceConfig that was used to generate its LatestCompatible property. Registry.CompatibleModules compares this property to the current settings received from its parameter and recalculates the compatible mods if needed.

That comparison gives the wrong answer because the reference held by CompatibilitySorter points to the same object that the other code modifies when you change the settings. So when the mod list is refreshed after the stability config change, the list of compatible mods is left the same as it was before, so the mod list isn't changed, and mod info receives the same mod as before.

Changes

• Now StabilityToleranceConfig has a copy constructor that makes a deep clone, and CompatibilitySorter uses it to capture an immtuable copy of its stability settings
• Now StabilityToleranceConfig implements IEquatable<StabilityToleranceConfig> and overrides operator!= to make sure the comparison is accurate

After this, changing the compatibility override for a mod will show the correct relationships on the Relationships tab.

[coveralls]

Coverage Report for CI Build 24290576706

Coverage increased (+0.01%) to 85.481%

Details

• Coverage increased (+0.01%) from the base build.
• Patch coverage: 13 of 13 lines across 3 files are fully covered (100%).
• No coverage regressions found.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	14215
Covered Lines:	11997
Line Coverage:	84.4%
Relevant Branches:	2163
Covered Branches:	2003
Branch Coverage:	92.6%
Branches in Coverage %:	Yes
Coverage Strength:	1.76 hits per line

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💛 - Coveralls