[feat] add initial database schema with tables, triggers, and views

database/main/kampftechnik.sql

@@ -0,0 +1,17 @@
+create table kampftechnik
+(
+    id             INTEGER
+        primary key,
+    optolith_key   TEXT              not null
+        unique,
+    name           TEXT              not null,
+    grundwert      INTEGER default 6 not null,
+    probe_attr1_id INTEGER
+        references attribute,
+    probe_attr2_id INTEGER
+        references attribute,
+    probe_attr3_id INTEGER
+        references attribute,
+    beschreibung   TEXT
+);
+