chore: mark series_comments.comment field as NOT NULL

Should be in 899ff5e commit.

Part of #1505

Author: php-coder

Diff for: src/main/resources/liquibase/version/0.4.6.xml

@@ -6,5 +6,6 @@
 		http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.9.xsd">
 
 	<include file="0.4.6/2021-01-30--series_comments.xml" relativeToChangelogFile="true" />
+	<include file="0.4.6/2021-01-31--make-comment-field-non-nullable.xml" relativeToChangelogFile="true" />
 
 </databaseChangeLog>

Diff for: src/main/resources/liquibase/version/0.4.6/2021-01-31--make-comment-field-non-nullable.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<databaseChangeLog
+		xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
+		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
+		http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.9.xsd">
+	
+	<changeSet id="make-series_comments-comment-non_nullable" author="php-coder" context="scheme">
+		
+		<addNotNullConstraint
+			tableName="series_comments"
+			columnName="comment"
+			columnDataType="VARCHAR(1024)"/>
+		
+	</changeSet>
+	
+</databaseChangeLog>