fix(ground): WSL에서 지반 생성 Python·DWG 변환 실행 경로 해결

- 공통 resolvePython: Windows venv → .venv/bin/python → PIERZAINER_PYTHON → python3/python
- 지반 생성·수량산출 Excel·DWG 출력 서버가 같은 해석기 사용, ENOENT 안내 문구 보강
- WSL에서 번들 dwg2dxf.exe 호출 시 wslpath -w로 경로 변환, .exe 실행 권한 부여
- 실제 운곡교 DWG+Excel로 엔진/HTTP 경로 생성 확인(교각16·지형6,545점)

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>

수량산출/server.ts

@@ -4,6 +4,7 @@ import {mkdir,readFile,writeFile} from 'node:fs/promises';
 import {randomUUID} from 'node:crypto';
 import path from 'node:path';
 import {exportEdits,type ExportRequest} from './export.ts';
+import {resolvePython,describeSpawnError} from '../pierzainer_ground/python-runtime.ts';
 export function quantityPlugin(root:string):Plugin{
  const handler=async(req:any,res:any)=>{
   const reply=(status:number,value:unknown)=>{res.writeHead(status,{'Content-Type':'application/json; charset=utf-8'});res.end(JSON.stringify(value));};
@@ -15,7 +16,7 @@ export function quantityPlugin(root:string):Plugin{
    for(const key of ['specFooting','specBody','specBlinding','specBearing','specMortar'])if(new Set(records.map(r=>String(r.specs[key]??''))).size>1)throw new Error('교각별 재료 규격이 서로 다릅니다. 원본 집계표의 동일 공종·규격에 합산할 수 없어 규격별 집계 검토가 필요합니다.');
    const payload={projects:records.map(r=>({...exportEdits(r),pier:r.pier})),bridge:records[0].project.bridge},folder=path.join(root,'수량산출/outputs',randomUUID());await mkdir(folder,{recursive:true});
    const input=path.join(folder,'edits.json'),output=path.join(folder,'quantity.xlsx');await writeFile(input,JSON.stringify(payload),'utf8');
-   await new Promise<void>((resolve,reject)=>{const child=spawn(path.join(root,'pierzainer_ground/.venv/Scripts/python.exe'),['-B','-X','utf8',path.join(root,'수량산출/tools/project_workbook.py'),input,output],{cwd:root,windowsHide:true});let logs='';child.stdout.on('data',b=>logs+=b);child.stderr.on('data',b=>logs+=b);const timer=setTimeout(()=>{child.kill();reject(new Error('Excel 출력 제한시간 초과'));},60000);child.once('error',e=>{clearTimeout(timer);reject(e);});child.once('close',code=>{clearTimeout(timer);if(code!==0)reject(new Error(logs));else resolve();});});
+   await new Promise<void>((resolve,reject)=>{const python=resolvePython(root),child=spawn(python,['-B','-X','utf8',path.join(root,'수량산출/tools/project_workbook.py'),input,output],{cwd:root,windowsHide:true});let logs='';child.stdout.on('data',b=>logs+=b);child.stderr.on('data',b=>logs+=b);const timer=setTimeout(()=>{child.kill();reject(new Error('Excel 출력 제한시간 초과'));},60000);child.once('error',e=>{clearTimeout(timer);reject(new Error(describeSpawnError(e,python)));});child.once('close',code=>{clearTimeout(timer);if(code!==0)reject(new Error(logs));else resolve();});});
    res.writeHead(200,{'Content-Type':'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet','Content-Disposition':'attachment; filename="quantity.xlsx"','Cache-Control':'no-store'});res.end(await readFile(output));
   }catch(e){reply(422,{error:(e as Error).message});}
  };