chore: save session state – feature/phase-1 ready to implement

- Update session-context.md with exact resume point for next session
- Update settings.local.json with broader git permissions
- feature/grundstruktur merged to develop
- PAT authentication configured

Version: 0.2.3

backend/app/schemas/tenant.py

@@ -0,0 +1,45 @@
+import uuid
+from datetime import datetime
+
+from pydantic import BaseModel, field_validator
+import re
+
+
+class TenantBase(BaseModel):
+    name: str
+    slug: str
+
+    @field_validator("slug")
+    @classmethod
+    def slug_format(cls, v: str) -> str:
+        if not re.match(r"^[a-z0-9-]+$", v):
+            raise ValueError(
+                "Der Slug darf nur Kleinbuchstaben, Zahlen und Bindestriche enthalten."
+            )
+        return v
+
+
+class TenantCreate(TenantBase):
+    pass
+
+
+class TenantUpdate(BaseModel):
+    name: str | None = None
+    slug: str | None = None
+
+    @field_validator("slug")
+    @classmethod
+    def slug_format(cls, v: str | None) -> str | None:
+        if v is not None and not re.match(r"^[a-z0-9-]+$", v):
+            raise ValueError(
+                "Der Slug darf nur Kleinbuchstaben, Zahlen und Bindestriche enthalten."
+            )
+        return v
+
+
+class TenantRead(TenantBase):
+    model_config = {"from_attributes": True}
+
+    id: uuid.UUID
+    created_at: datetime
+    updated_at: datetime