Move database logic into separate subdirectory

I'm trying to see if this speeds up builds a bit. May not without a
module boundary, but for now it's nice organization to have as the
program grows.

db/sql/traplocation_by_source_id.sql

@@ -0,0 +1,14 @@
+-- TrapLocationBySourceID
+SELECT 
+	tl.globalid AS trap_location_globalid,
+	ST_Distance(pl.geom, tl.geom) AS distance
+FROM 
+	fs_pointlocation pl
+CROSS JOIN
+	fs_traplocation tl
+WHERE 
+	tl.organization_id = $1 AND
+	pl.globalid = $2
+ORDER BY 
+	ST_Distance(pl.geom, tl.geom)
+LIMIT 4