fix(parser): condition tree parser on HasMany or Polymorphic relations

[DayTF]

Definition of Done

General

• Write an explicit title for the Pull Request, following Conventional Commits specification
• Test manually the implemented changes
• Validate the code quality (indentation, syntax, style, simplicity, readability)

Security

• Consider the security impact of the changes made

Note

Fix ConditionTreeParser.parse_value to cast values using foreign key schema for ManyToOne relations

When a filter targets a ManyToOne or PolymorphicManyToOne relation field, parse_value was using the relation type itself to determine casting, causing incorrect value handling. The fix resolves the field schema to the relation's foreign key schema before casting, so operators like IN, NOT_IN, and EQUAL on relation fields produce correctly typed values.

^{Macroscope summarized 35a03b9.}