Add hexagon backend

pipeline/base.py

@@ -0,0 +1,22 @@
+from abc import ABC, abstractmethod
+import polars as pl
+
+
+class DataSource(ABC):
+    """Base class for all data sources."""
+
+    @property
+    @abstractmethod
+    def name(self) -> str:
+        """Unique identifier for this data source."""
+        pass
+
+    @abstractmethod
+    def load(self) -> pl.LazyFrame:
+        """Load raw data as LazyFrame."""
+        pass
+
+    @abstractmethod
+    def process(self, postcodes: pl.LazyFrame) -> pl.LazyFrame:
+        """Process and join with postcode coordinates."""
+        pass