database: Update schema_version to 13

sql/v01/11.create.client.sql

@@ -206,3 +206,17 @@ CREATE TABLE area_commitment (
         ON UPDATE CASCADE
         ON DELETE RESTRICT
 ) STRICT;
+
+CREATE TABLE member_history (
+    mgnr            INTEGER NOT NULL,
+    date            TEXT    NOT NULL CHECK (date REGEXP '^[1-9][0-9]{3}-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])$') DEFAULT CURRENT_DATE,
+
+    business_shares INTEGER NOT NULL,
+    type            TEXT    NOT NULL CHECK (type REGEXP '^[a-z_]+$'),
+    comment         TEXT DEFAULT NULL,
+
+    CONSTRAINT pk_member_history PRIMARY KEY (mgnr, date),
+    CONSTRAINT fk_member_history_member FOREIGN KEY (mgnr) REFERENCES member (mgnr)
+        ON UPDATE CASCADE
+        ON DELETE CASCADE
+) STRICT;