[Bug Report]: When a module serves as both an entry file and dynamically introduces dependencies, it can cause module grouping exceptions

[NidMo]

Steps to reproduce

1. Project Structure

   examples/import-meta/
   ├── a.ts
   ├── index.ts
   ├── farm.config.ts
   └── package.json
   

2. index.ts

   console.log(new URL("./foo.txt", import.meta.url));
   
   function loadA() {
     import("./a").then((res) => {
       console.log("res:", res);
     });
   }

3. a.ts

   export const msg = "hello from a";

4. farm.config.ts
   (Make sure to explicitly set both index.ts and a.ts as entries.)

   export default {
     input: {
       main: "./index.ts",
       a: "./a.ts",
     },
   };

5. Run the Build

Reproduce link

No response

What is actually happening?

Expected to optimize the entry type, but an error occurred：

thread '<unnamed>' panicked at crates/core/src/module/module_group.rs:47:51:
called `Option::unwrap()` on a `None` value
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Rayon: detected unexpected panic; aborting

System Info

System:
    OS: macOS 26.1
    CPU: (8) arm64 Apple M1 Pro
    Memory: 78.56 MB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 22.17.1 - /Users/ming07/.nvm/versions/node/v22.17.1/bin/node
    Yarn: 1.22.5 - /Users/ming07/.yarn/bin/yarn
    npm: 10.9.2 - /Users/ming07/.nvm/versions/node/v22.17.1/bin/npm
    pnpm: 9.12.2 - /Users/ming07/Library/pnpm/pnpm
    Deno: 1.23.2 - /Users/ming07/.deno/bin/deno
    Watchman: 2023.04.10.00 - /opt/homebrew/bin/watchman
  Browsers:
    Chrome: 143.0.7499.41
    Safari: 26.1
  npmPackages:
    @farmfe/core: workspace:* => 2.0.0-beta.7