feat(ocr): wire SenderModelService into OcrAsyncRunner; stage missing foundational files

OcrAsyncRunner now passes the per-sender model path to streamBlocks for
HANDWRITING_KURRENT documents. processDocument replaced extractBlocks
with streamBlocks + AtomicReference, removing the unchecked raw-array
pattern.

Also stages all previously uncommitted foundational files for this
feature: SenderModel entity, SenderModelRepository, Flyway migrations
V40/V41, updated OcrClient/RestClientOcrClient streaming API,
TrainingDataExportService.exportForSender, TranscriptionService Kurrent
hook, application.yaml OCR config, and frontend i18n/test additions.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/lib/components/TrainingHistory.svelte.spec.ts

@@ -50,3 +50,26 @@ describe('TrainingHistory — expand/collapse', () => {
 			.not.toBeInTheDocument();
 	});
 });
+
+describe('TrainingHistory — type and person columns', () => {
+	it('shows "Basis" for runs without personId', async () => {
+		render(TrainingHistory, { runs: [makeRun(0)] });
+
+		await expect.element(page.getByText(/Basis/i)).toBeInTheDocument();
+	});
+
+	it('shows "Personalisiert" for runs with personId', async () => {
+		const run = { ...makeRun(0), personId: 'person-1' };
+		render(TrainingHistory, { runs: [run], personNames: { 'person-1': 'Karl Müller' } });
+
+		await expect.element(page.getByText(/Personalisiert/i)).toBeInTheDocument();
+	});
+
+	it('shows person name from personNames for sender runs', async () => {
+		const run = { ...makeRun(0), personId: 'person-1' };
+		render(TrainingHistory, { runs: [run], personNames: { 'person-1': 'Karl Müller' } });
+
+		await expect.element(page.getByText(/Personalisiert/i)).toBeInTheDocument();
+		await expect.element(page.getByText('Karl Müller')).toBeInTheDocument();
+	});
+});