feat: beta channels for core and plugins with one stable/beta release workflow

src/backend/database/db/index.ts

@@ -509,6 +509,7 @@ async function initializeCompleteDatabase(): Promise<void> {
         updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
         auto_update INTEGER NOT NULL DEFAULT 0,
         pinned_version TEXT,
+        channel TEXT NOT NULL DEFAULT 'stable',
         manifest_json TEXT NOT NULL
     );
     CREATE INDEX IF NOT EXISTS idx_plugins_registry_id ON plugins (registry_id);
@@ -1607,6 +1608,7 @@ const migrateSchema = () => {
   // grants record whether a capability came from an admin or from bundling.
   addColumnIfNotExists("plugins", "last_error", "TEXT");
   addColumnIfNotExists("plugins", "pinned_version", "TEXT");
+  addColumnIfNotExists("plugins", "channel", "TEXT NOT NULL DEFAULT 'stable'");
   addColumnIfNotExists(
     "plugin_permission_grants",
     "source",

src/backend/database/db/schema.mysql.ts

@@ -1007,6 +1007,8 @@ export const plugins = mysqlTable(
       .default(false),
     /** Version an admin pinned. Never auto-updated while set. */
     pinnedVersion: text("pinned_version"),
+    /** stable | beta: which registry releases updates offer. */
+    channel: text("channel").notNull().default("stable"),
     manifestJson: text("manifest_json").notNull(),
   },
   (table) => [index("idx_plugins_registry_id").on(table.registryId)],

src/backend/database/db/schema.pg.ts

@@ -1007,6 +1007,8 @@ export const plugins = pgTable(
       .default(false),
     /** Version an admin pinned. Never auto-updated while set. */
     pinnedVersion: text("pinned_version"),
+    /** stable | beta: which registry releases updates offer. */
+    channel: text("channel").notNull().default("stable"),
     manifestJson: text("manifest_json").notNull(),
   },
   (table) => [index("idx_plugins_registry_id").on(table.registryId)],

src/backend/database/db/schema.ts

@@ -1005,6 +1005,8 @@ export const plugins = sqliteTable(
       .default(false),
     /** Version an admin pinned. Never auto-updated while set. */
     pinnedVersion: text("pinned_version"),
+    /** stable | beta: which registry releases updates offer. */
+    channel: text("channel").notNull().default("stable"),
     manifestJson: text("manifest_json").notNull(),
   },
   (table) => [index("idx_plugins_registry_id").on(table.registryId)],