Please support using directory environment variables in LSP and DAP

1. Basic information.
   I am using mise to manage dev tools and env vars.
   For example, it is using node@24.19.0 in folder /e/documents/temp/lsp4ij and but node@16.20.2 in folder /e/documents/temp/lsp4ij/useEnv.

david@lywPc /e/documents/temp/lsp4ij
$ mise ls -c
Tool                            Version           Source                                   Requested  
go                              1.26.3 (symlink)  C:\Users\david\.config\mise\config.toml  1.26
java                            21 (symlink)      C:\Users\david\.config\mise\config.toml  21
node                            24.19.0           C:\Users\david\.config\mise\config.toml  24.19.0
npm:@colbymchenry/codegraph     1.5.0             C:\Users\david\.config\mise\config.toml  1.5.0
npm:@dbx-app/mcp-server         0.4.62            C:\Users\david\.config\mise\config.toml  0.4.62
npm:@deepseek-ai/dsh            0.1.0-rc.7        C:\Users\david\.config\mise\config.toml  0.1.0-rc.7
npm:@vue/language-server        2.2.8             C:\Users\david\.config\mise\config.toml  2.2.8
npm:bash-language-server        5.6.0             C:\Users\david\.config\mise\config.toml  5.6.0
npm:stylelint-lsp               2.0.1             C:\Users\david\.config\mise\config.toml  2.0.1
npm:typescript                  5.6.3             C:\Users\david\.config\mise\config.toml  5.6.3
npm:typescript-language-server  5.3.0             C:\Users\david\.config\mise\config.toml  5.3.0
python                          3 (symlink)       C:\Users\david\.config\mise\config.toml  3

david@lywPc /e/documents/temp/lsp4ij
$ node -v
v24.19.0

david@lywPc /e/documents/temp/lsp4ij
$ cd useEnv/

david@lywPc /e/documents/temp/lsp4ij/useEnv
$ mise ls -c
Tool                            Version           Source                                     Requested  
go                              1.26.3 (symlink)  C:\Users\david\.config\mise\config.toml    1.26
java                            21 (symlink)      C:\Users\david\.config\mise\config.toml    21
node                            16.20.2           E:\documents\temp\lsp4ij\useEnv\mise.toml  16.20.2
npm:@colbymchenry/codegraph     1.5.0             C:\Users\david\.config\mise\config.toml    1.5.0
npm:@dbx-app/mcp-server         0.4.62            C:\Users\david\.config\mise\config.toml    0.4.62
npm:@deepseek-ai/dsh            0.1.0-rc.7        C:\Users\david\.config\mise\config.toml    0.1.0-rc.7
npm:@vue/language-server        2.2.8             C:\Users\david\.config\mise\config.toml    2.2.8
npm:bash-language-server        5.6.0             C:\Users\david\.config\mise\config.toml    5.6.0
npm:stylelint-lsp               2.0.1             C:\Users\david\.config\mise\config.toml    2.0.1
npm:typescript                  5.6.3             C:\Users\david\.config\mise\config.toml    5.6.3
npm:typescript-language-server  5.3.0             C:\Users\david\.config\mise\config.toml    5.3.0
python                          3 (symlink)       C:\Users\david\.config\mise\config.toml    3

david@lywPc /e/documents/temp/lsp4ij/useEnv
$ node -v
v16.20.2

david@lywPc /e/documents/temp/lsp4ij/useEnv
$ ll
total 3.0K
-rw-r--r-- 1 david david  25 Sep  2 21:22 mise.toml
-rw-r--r-- 1 david david 250 Sep  2 21:26 package.json
-rw-r--r-- 1 david david  78 Sep  2 21:31 test.js

david@lywPc /e/documents/temp/lsp4ij/useEnv
$ 

/e/documents/temp/lsp4ij/useEnv/package.json

{
  "name": "useenv",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "nodeVersion": "node -v"
  },
  "keywords": [],
  "author": "",
  "license": "ISC"
}

/e/documents/temp/lsp4ij/useEnv/test.js

console.log("enter test.js");
console.log(`node version: ${process.version}`);

2. Npm Run/Debug Configuration is using env vars ( node@16.20.2 e.g.) under folder useEnv.
   Create Run/Debug Configuration useEnv as below and run it.

You can see it is using env vars ( node@16.20.2 e.g.) under folder `useEnv`.

3. But DAP is using node@24.19.0, not the env vars under folder useEnv.

Reproduce the issue with the nested useEnv/mise.toml, package.json, test.js, and the shown DAP launch configuration. Trace how the DAP configuration resolves its working directory and environment, then verify that it selects node@16.20.2 in useEnv while retaining node@24.19.0 in the parent directory.