[YAML] Enhance removedModel method in all providers

[lolodomo]

The enhancement consists in just getting the UID of the elements to be removed rather than building a full object.

[lolodomo]

@Nadahar for information as it is in response to something you reported.

[Nadahar]

@lolodomo I tried to see if I could review it, but I find the streams stuff completely unreadable and can't really see what has changed (except for writing the streams slightly different). Sorry, but my review doesn't matter much anyway 😉

[mherwege]

What about also delaying the mapping in the addedModel and updatedModel until listeners have to be notified (which would require the object)? That would avoid the mapping all together if the model is isolated.

[Copilot]

Pull request overview

Optimizes YAML model removal handling by avoiding construction of full domain objects when removing elements, relying instead on DTO identifiers (UID/name) to find and remove existing elements from in-memory collections.

Changes:

• Update removedModel in Thing provider to remove Things by DTO uid rather than mapping full Thing objects.
• Update removedModel in Semantic Tag provider to remove tags by DTO uid rather than mapping full SemanticTag objects.
• Update removedModel in Item provider to remove items by DTO name rather than mapping full Item objects.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
bundles/org.openhab.core.model.yaml/src/main/java/org/openhab/core/model/yaml/internal/things/YamlThingProvider.java	Removes Things using DTO uid directly rather than building Things for comparison.
bundles/org.openhab.core.model.yaml/src/main/java/org/openhab/core/model/yaml/internal/semantics/YamlSemanticTagProvider.java	Removes SemanticTags using DTO uid directly rather than building SemanticTag instances.
bundles/org.openhab.core.model.yaml/src/main/java/org/openhab/core/model/yaml/internal/items/YamlItemProvider.java	Removes Items using DTO name directly rather than building Items for removal lookup.

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