chore: upgrade version to `0.9.0` (#835)

server/version/version.go

@@ -7,10 +7,10 @@ import (
 
 // Version is the service current released version.
 // Semantic versioning: https://semver.org/
-var Version = "0.8.3"
+var Version = "0.9.0"
 
 // DevVersion is the service current development version.
-var DevVersion = "0.8.3"
+var DevVersion = "0.9.0"
 
 func GetCurrentVersion(mode string) string {
 	if mode == "dev" {

store/db/migration/prod/0.9/00__tag.sql

@@ -0,0 +1,6 @@
+-- tag
+CREATE TABLE tag (
+  name TEXT NOT NULL,
+  creator_id INTEGER NOT NULL,
+  UNIQUE(name, creator_id)
+);

store/db/migration/prod/LATEST__SCHEMA.sql

@@ -86,3 +86,10 @@ CREATE TABLE memo_resource (
   updated_ts BIGINT NOT NULL DEFAULT (strftime('%s', 'now')),
   UNIQUE(memo_id, resource_id)
 );
+
+-- tag
+CREATE TABLE tag (
+  name TEXT NOT NULL,
+  creator_id INTEGER NOT NULL,
+  UNIQUE(name, creator_id)
+);