Refactor QueryArgsConfig into reusable per-entity classes, add query AI-enablement docs

[chullybun]

Summary

• Introduce QueryArgsConfig<TSelf> (CRTP) with a lazy-instantiated Default singleton, replacing the private static readonly QueryArgsConfig fields previously declared inline in each repository.
• Extract Order/Movement/Product query configuration into dedicated {Name}QueryArgsConfig classes under Infrastructure/Repositories/.
• Fix OrderQueryArgsConfig: drop the incorrect WithDefaultModelPrefix("Order") — Order queries run directly against the entity with no anonymous projection, unlike Product, which does project and correctly keeps its prefix.
• Add WithNoModelPrefix() to clear a field's model prefix; WithModelPrefix(string?) no longer silently accepts null (throws), removing the prior ambiguity between "set" and "clear".
• Rename MovementRepository.SaveAndGetAllMutatedMovements → ...Async to follow the async naming convention.
• Update coreex-repository / coreex-test-api skills and instructions with an explicit interview step before generating query configuration (fields, operators, model mapping are business decisions the agent must collect, not infer), plus field-type/operator reference tables and expanded query test guidance.

Notes

• OrderQueryArgsConfig.CustomerId now only supports EqualityOperators (previously also had StartsWith) — Orders is a WIP domain per copilot-instructions.md and has no query test coverage yet, so this is a scope trim rather than a regression against any tested behaviour.
• Products' ProductQueryArgsConfig/MovementQueryArgsConfig are exercised end-to-end by ReadTests.ProductQuery.cs / ReadTests.MovementQuery.cs.

Validation

• dotnet build CoreEx.sln — succeeded, 0 errors.
• dotnet test tests\CoreEx.Data.Test.Unit — 120/120 passed on net8.0/net9.0/net10.0.

[Copilot]

Pull request overview

This PR refactors CoreEx QueryArgs configuration into reusable per-entity classes (via a CRTP-based QueryArgsConfig<TSelf>.Default singleton) and updates the repository/testing guidance to make query configuration and query tests more explicit and repeatable across entities.

Changes:

• Introduces QueryArgsConfig<TSelf> with a lazy Default instance, and adds WithNoModelPrefix() to explicitly clear a field model prefix.
• Extracts Product/Movement/Order query configuration into dedicated *QueryArgsConfig classes and updates repositories to use the new Default pattern.
• Expands coreex-repository / coreex-test-api guidance to require an explicit “interview” step for query field/operator decisions and adds richer query testing patterns.

Reviewed changes

Copilot reviewed 13 out of 14 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/CoreEx.Data/Querying/QueryFilterFieldConfigBaseT.cs	Tightens model-prefix APIs (no implicit null) and adds an explicit “clear prefix” helper.
src/CoreEx.Data/Querying/QueryArgsConfigT.cs	Adds CRTP QueryArgsConfig<TSelf> with lazy Default singleton instance.
src/CoreEx.Data/Querying/QueryArgsConfig.cs	Formatting-only change (trailing newline).
src/CoreEx.Data/Querying/IQueryFilterFieldConfig.cs	Clarifies ModelPrefix semantics in documentation.
samples/src/Contoso.Products.Infrastructure/Repositories/ProductRepository.cs	Switches query parsing/schema to ProductQueryArgsConfig.Default.
samples/src/Contoso.Products.Infrastructure/Repositories/ProductQueryArgsConfig.cs	New extracted Product query config (filter/order-by).
samples/src/Contoso.Products.Infrastructure/Repositories/MovementRepository.cs	Renames internal async helper and switches query parsing/schema to MovementQueryArgsConfig.Default.
samples/src/Contoso.Products.Infrastructure/Repositories/MovementQueryArgsConfig.cs	New extracted Movement query config (filter/order-by).
samples/src/Contoso.Orders.Infrastructure/Repositories/OrderRepository.cs	Switches query parsing to OrderQueryArgsConfig.Default.
samples/src/Contoso.Orders.Infrastructure/Repositories/OrderQueryArgsConfig.cs	New extracted Order query config (filter/order-by), removing the prior model prefix and trimming operators.
.github/skills/coreex-test-api/references/workflow.md	Expands “Query” test expectations and provides seed/test patterns and examples.
.github/skills/coreex-repository/SKILL.md	Updates skill interview prompts to collect explicit query field/operator/mapping decisions.
.github/skills/coreex-repository/references/workflow.md	Reworks repository workflow to use per-entity QueryArgsConfig<TSelf> classes and adds operator/type reference guidance.
.github/instructions/coreex-repositories.instructions.md	Updates repository instructions to prefer QueryArgsConfig<TSelf> and adds field/operator/mapping guidance.

Comments suppressed due to low confidence (1)

src/CoreEx.Data/Querying/QueryFilterFieldConfigBaseT.cs:30

• The <returns> XML doc for WithNoModelPrefix says it returns QueryFilterParser, but the method returns TSelf. Updating this keeps the fluent API documentation accurate.

    /// <summary>
    /// Clears (overrides) the optional <see cref="QueryFilterFieldConfigBase.ModelPrefix"/> to be used where referencing the underlying <see cref="IQueryable{T}"/> model.
    /// </summary>
    /// <returns>The <see cref="QueryFilterParser"/> to support fluent-style method-chaining.</returns>
    public TSelf WithNoModelPrefix()

[Copilot]

Pull request overview

Copilot reviewed 13 out of 14 changed files in this pull request and generated 2 comments.

[Copilot]

Pull request overview

Copilot reviewed 13 out of 14 changed files in this pull request and generated 3 comments.

[Copilot]

Pull request overview

Copilot reviewed 15 out of 16 changed files in this pull request and generated no new comments.

[Copilot]

Pull request overview

Copilot reviewed 15 out of 16 changed files in this pull request and generated no new comments.