reduce duplication

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[Copilot]

Pull request overview

Refactors WorkerEmitter in MinimalWorker’s source generator to reduce duplicated code emission across continuous, periodic, and cron worker initializers by extracting common emission patterns into helper methods.

Changes:

• Extracted repeated code emission blocks (dependency validation, DI parameter resolution, delegate invocation, telemetry/activity setup, success/error/duration recording, deactivation logging) into dedicated private helper methods.
• Standardized worker “type” usage by introducing a local workerType constant per worker initializer and passing it through common helpers.

[Copilot]

EmitTagListInit emits interpolated strings that contain literal } characters without escaping them (e.g., the lines emitting { "worker.id", workerId }, and { "worker.name", workerName },). In interpolated strings, literal closing braces must be escaped (}}), otherwise this won’t compile. Please update those AppendLine calls to properly escape the closing braces (or switch those lines to non-interpolated strings with a separate indent prefix).

Suggested change

	sb.AppendLine($"{indent}}};");
	sb.AppendLine(indent + "};");