Fix DB schema for language models (#133)

drizzle/0005_hesitant_sister_grimm.sql

@@ -0,0 +1,20 @@
+CREATE TABLE `language_model_providers` (
+	`id` text PRIMARY KEY NOT NULL,
+	`name` text NOT NULL,
+	`api_base_url` text NOT NULL,
+	`env_var_name` text,
+	`created_at` integer DEFAULT (unixepoch()) NOT NULL,
+	`updated_at` integer DEFAULT (unixepoch()) NOT NULL
+);
+--> statement-breakpoint
+CREATE TABLE `language_models` (
+	`id` text PRIMARY KEY NOT NULL,
+	`name` text NOT NULL,
+	`provider_id` text NOT NULL,
+	`description` text,
+	`max_output_tokens` integer,
+	`context_window` integer,
+	`created_at` integer DEFAULT (unixepoch()) NOT NULL,
+	`updated_at` integer DEFAULT (unixepoch()) NOT NULL,
+	FOREIGN KEY (`provider_id`) REFERENCES `language_model_providers`(`id`) ON UPDATE no action ON DELETE cascade
+);