Update legacy

Implements script to fill gaps in legacy data.

geomagio/processing/__init__.py

-from .main import main
+"""Package with near-real time processing configurations.
 
-__all__ = ["main"]
+Note that these implementations are subject to change,
+and should be considered less stable than other packages in the library.
+"""
+from .factory import get_edge_factory, get_miniseed_factory
+from .observatory import adjusted, average, deltaf, rotate, sqdist_minute
+from .obsrio import obsrio_minute, obsrio_second, obsrio_temperatures, obsrio_tenhertz
+
+
+__all__ = [
+    "adjusted",
+    "average",
+    "deltaf",
+    "get_edge_factory",
+    "get_miniseed_factory",
+    "obsrio_minute",
+    "obsrio_second",
+    "obsrio_temperatures",
+    "obsrid_tenhertz",
+    "rotate",
+    "sqdist_minute",
+]