[Clean Code/SPoT] Rename ApplicationProfile to ApplicationAssignment throughout the product

[github-actions]

Audit finding

ApplicationProfile represents an executable assignment, while VisualProfile represents the actual color profile. The two meanings are mixed across:

• model and management-service names;
• grid event names;
• form methods and variables;
• UI counters that label configured applications as PROFILE(S);
• notifications and documentation.

This vocabulary increases cognitive load and makes code review/error messages ambiguous.

Target state

Use ApplicationAssignment consistently for executable-to-profile configuration. Reserve VisualProfile and “profile” wording for color-transform profiles.

Persisted JSON property names must remain backward compatible.

Acceptance criteria

• Runtime/domain type is named ApplicationAssignment.
• Management services, events, row models and variables use assignment terminology.
• Configuration UI counts and labels say applications/assignments rather than profiles.
• Visual-profile manager continues to use profile terminology.
• JSON settings remain compatible without forcing users to migrate manually.
• Tests and documentation use the same ubiquitous language.