Add epanet input schema

sql/section_create/5.pipes.sql

@@ -0,0 +1,15 @@
+-- [PIPES]
+
+CREATE TYPE PIPES_STATUS AS ENUM ('OPEN', 'CLOSED', 'CV');
+
+CREATE TABLE PIPES
+(
+  ID VARCHAR(32) PRIMARY KEY REFERENCES _LINK(ID)
+, Node1 VARCHAR(32) REFERENCES _NODE(ID) NOT NULL
+, Node2 VARCHAR(32) REFERENCES _NODE(ID) NOT NULL
+, Length NUMERIC NOT NULL
+, Diameter NUMERIC NOT NULL
+, Roughness NUMERIC NOT NULL
+, MinorLoss NUMERIC NOT NULL
+, Status PIPES_STATUS NOT NULL
+);