Add Apply now and save as rule flow

[PrimeBuild-pc]

Summary

• Add ProcessRuleCreationService for explicit persistent rule creation/update from Process tab actions.
• Add a compact Process tab Rules context submenu with Save Current Settings as Rule and Apply Affinity and Save as Rule.
• Preserve opt-in behavior: existing affinity, CPU priority, and memory priority actions do not save persistent rules.

Behavior

• Matches existing rules by executable path when available, with pathless process-name fallback to avoid duplicate rules.
• Preserves Id and CreatedAt when updating an existing rule, and refreshes UpdatedAt plus selected action payloads.
• Prefers CpuSelection when available or migratable through topology; only saves legacy affinity when safely representable.
• Blocks Realtime priority and unsafe affinity persistence with controlled user messages.

Tests

• Added ProcessRuleCreationServiceTests covering path/name matching, create/update, timestamp preservation, CPU selection, safe/unsafe legacy affinity, Realtime blocking, memory priority, and no-action failures.
• Extended Process tab context menu tests for explicit save/apply-save commands, row-process routing, summary refresh, affinity failure behavior, and normal actions remaining non-persistent.

Validation

• dotnet test "ThreadPilot_1.sln" --configuration Release --no-restore
• Result: Passed, 352 tests, 0 failed, 0 skipped.

Limitations

• This PR intentionally does not add a full rules editor or modal confirmation flow.
• Apply-and-save for CPU Sets relies on the existing topology/migration path to persist a saveable selection.

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Codecov Report

❌ Patch coverage is 82.05980% with 54 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
Services/ProcessRuleCreationService.cs	83.25%	21 Missing and 17 partials ⚠️
ViewModels/ProcessViewModel.Behaviors.partial.cs	77.27%	8 Missing and 7 partials ⚠️
Services/ServiceConfiguration.cs	0.00%	1 Missing ⚠️

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