chore: add workspace proxies to the backend (#7032)

Co-authored-by: Dean Sheather <dean@deansheather.com>

coderd/database/migrations/000118_workspace_proxy_token.down.sql

@@ -0,0 +1,6 @@
+BEGIN;
+
+ALTER TABLE workspace_proxies
+	DROP COLUMN token_hashed_secret;
+
+COMMIT;

coderd/database/migrations/000118_workspace_proxy_token.up.sql

@@ -0,0 +1,22 @@
+BEGIN;
+
+-- It's difficult to generate tokens for existing proxies, so we'll just delete
+-- them if they exist.
+--
+-- No one is using this feature yet as of writing this migration, so this is
+-- fine.
+DELETE FROM workspace_proxies;
+
+ALTER TABLE workspace_proxies
+	ADD COLUMN token_hashed_secret bytea NOT NULL;
+
+COMMENT ON COLUMN workspace_proxies.token_hashed_secret
+	IS 'Hashed secret is used to authenticate the workspace proxy using a session token.';
+
+COMMENT ON COLUMN workspace_proxies.deleted
+	IS 'Boolean indicator of a deleted workspace proxy. Proxies are soft-deleted.';
+
+COMMENT ON COLUMN workspace_proxies.icon
+	IS 'Expects an emoji character. (/emojis/1f1fa-1f1f8.png)';
+
+COMMIT;

coderd/database/migrations/testdata/fixtures/000114_workspace_proxy.up.sql

@@ -1,14 +0,0 @@
-INSERT INTO workspace_proxies
-	(id, name, display_name, icon, url, wildcard_hostname, created_at, updated_at, deleted)
-VALUES
-	(
-		 'cf8ede8c-ff47-441f-a738-d92e4e34a657',
-	 	 'us',
-	 	 'United States',
-		 '/emojis/us.png',
-		 'https://us.coder.com',
-		 '*.us.coder.com',
-		'2023-03-30 12:00:00.000+02',
-		'2023-03-30 12:00:00.000+02',
-		 false
-	);

coderd/database/migrations/testdata/fixtures/000118_workspace_proxy_token.up.sql

@@ -0,0 +1,15 @@
+INSERT INTO workspace_proxies
+	(id, name, display_name, icon, url, wildcard_hostname, created_at, updated_at, deleted, token_hashed_secret)
+VALUES
+	(
+		'cf8ede8c-ff47-441f-a738-d92e4e34a657',
+		'us',
+		'United States',
+		'/emojis/us.png',
+		'https://us.coder.com',
+		'*.us.coder.com',
+		'2023-03-30 12:00:00.000+02',
+		'2023-03-30 12:00:00.000+02',
+		false,
+		'abc123'::bytea
+	);