feat: refactor to FastAPI architecture v2.0

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

app/models/event.py

@@ -0,0 +1,34 @@
+"""Pydantic v2 models for Scenar Creator."""
+
+from datetime import date, time
+from typing import List, Optional
+
+from pydantic import BaseModel, Field
+
+
+class Block(BaseModel):
+    datum: date
+    zacatek: time
+    konec: time
+    program: str
+    typ: str
+    garant: Optional[str] = None
+    poznamka: Optional[str] = None
+
+
+class ProgramType(BaseModel):
+    code: str
+    description: str
+    color: str  # hex #RRGGBB
+
+
+class EventInfo(BaseModel):
+    title: str = Field(..., max_length=200)
+    detail: str = Field(..., max_length=500)
+
+
+class ScenarioDocument(BaseModel):
+    version: str = "1.0"
+    event: EventInfo
+    program_types: List[ProgramType]
+    blocks: List[Block]