feat: added periodic tasks in backend db and frontend hooks

- TODO: Add celery redbeat and create tasks dinamically in our redis

surfsense_backend/app/schemas/search_source_connector.py

@@ -2,7 +2,7 @@ import uuid
 from datetime import datetime
 from typing import Any
 
-from pydantic import BaseModel, ConfigDict, field_validator
+from pydantic import BaseModel, ConfigDict, field_validator, model_validator
 
 from app.db import SearchSourceConnectorType
 from app.utils.validators import validate_connector_config
@@ -16,6 +16,9 @@ class SearchSourceConnectorBase(BaseModel):
     is_indexable: bool
     last_indexed_at: datetime | None = None
     config: dict[str, Any]
+    periodic_indexing_enabled: bool = False
+    indexing_frequency_minutes: int | None = None
+    next_scheduled_at: datetime | None = None
 
     @field_validator("config")
     @classmethod
@@ -25,6 +28,22 @@ class SearchSourceConnectorBase(BaseModel):
         connector_type = values.data.get("connector_type")
         return validate_connector_config(connector_type, config)
 
+    @model_validator(mode="after")
+    def validate_periodic_indexing(self):
+        """Validate that periodic indexing configuration is consistent."""
+        if self.periodic_indexing_enabled:
+            if not self.is_indexable:
+                raise ValueError(
+                    "periodic_indexing_enabled can only be True for indexable connectors"
+                )
+            if self.indexing_frequency_minutes is None:
+                raise ValueError(
+                    "indexing_frequency_minutes is required when periodic_indexing_enabled is True"
+                )
+            if self.indexing_frequency_minutes <= 0:
+                raise ValueError("indexing_frequency_minutes must be greater than 0")
+        return self
+
 
 class SearchSourceConnectorCreate(SearchSourceConnectorBase):
     pass
@@ -36,6 +55,9 @@ class SearchSourceConnectorUpdate(BaseModel):
     is_indexable: bool | None = None
     last_indexed_at: datetime | None = None
     config: dict[str, Any] | None = None
+    periodic_indexing_enabled: bool | None = None
+    indexing_frequency_minutes: int | None = None
+    next_scheduled_at: datetime | None = None
 
 
 class SearchSourceConnectorRead(SearchSourceConnectorBase, IDModel, TimestampModel):