fix(plugins): lazily initialize runtime and split plugin-sdk startup imports (#28620)

Merged via squash.

Prepared head SHA: 8bd7d6c13b
Co-authored-by: hmemcpy <601206+hmemcpy@users.noreply.github.com>
Co-authored-by: gumadeiras <5599352+gumadeiras@users.noreply.github.com>
Reviewed-by: @gumadeiras

tsdown.config.ts

@@ -30,6 +30,24 @@ export default defineConfig([
     fixedExtension: false,
     platform: "node",
   },
+  {
+    // Keep sync lazy-runtime channel modules as concrete dist files.
+    entry: {
+      "channels/plugins/agent-tools/whatsapp-login":
+        "src/channels/plugins/agent-tools/whatsapp-login.ts",
+      "channels/plugins/actions/discord": "src/channels/plugins/actions/discord.ts",
+      "channels/plugins/actions/signal": "src/channels/plugins/actions/signal.ts",
+      "channels/plugins/actions/telegram": "src/channels/plugins/actions/telegram.ts",
+      "telegram/audit": "src/telegram/audit.ts",
+      "telegram/token": "src/telegram/token.ts",
+      "line/accounts": "src/line/accounts.ts",
+      "line/send": "src/line/send.ts",
+      "line/template-messages": "src/line/template-messages.ts",
+    },
+    env,
+    fixedExtension: false,
+    platform: "node",
+  },
   {
     entry: "src/plugin-sdk/index.ts",
     outDir: "dist/plugin-sdk",
@@ -37,6 +55,20 @@ export default defineConfig([
     fixedExtension: false,
     platform: "node",
   },
+  {
+    entry: "src/plugin-sdk/core.ts",
+    outDir: "dist/plugin-sdk",
+    env,
+    fixedExtension: false,
+    platform: "node",
+  },
+  {
+    entry: "src/plugin-sdk/telegram.ts",
+    outDir: "dist/plugin-sdk",
+    env,
+    fixedExtension: false,
+    platform: "node",
+  },
   {
     entry: "src/plugin-sdk/account-id.ts",
     outDir: "dist/plugin-sdk",