feat(nlp-service): scaffold — models, requirements, CLAUDE.md

Task 1: Create standalone FastAPI service scaffold with models, test framework,
and documentation. Includes ParseRequest, ParseResponse Pydantic models matching
OllamaExtraction contract, plus three passing tests validating model validation.

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

nlp-service/models.py

@@ -0,0 +1,17 @@
+from __future__ import annotations
+from typing import Literal
+from pydantic import BaseModel
+
+
+class ParseRequest(BaseModel):
+    query: str
+    lang: Literal["de", "en", "es"]
+
+
+class ParseResponse(BaseModel):
+    personNames: list[str]
+    personRole: Literal["sender", "receiver", "any"]
+    dateFrom: str | None
+    dateTo: str | None
+    keywords: list[str]
+    rawQuery: str