Flux git-text in-arbore: git_sync.ps1 + teste, txt2vcx in-place, filemap pjx/dbf

- git_sync.ps1 nou: conversie recursiva bin->text in arbore (staging temp,
  incremental, orfani, RoundtripExempt, DbfList cu date, anti-dialog cfg)
- vfp_filemap.ps1: mapari .pjx->.pj2 si .dbf->.db2
- txt2vcx.ps1: CacheRoot implicit = ProjectRoot (text in-arbore) + cfg anti-dialog in staging
- test_roundtrip.ps1: parametrizat per proiect, restaurare din backup temp (nu git checkout)
- test_git_sync.ps1 nou: incremental, orfani, esec partial, protectie binar, scutire roundtrip
- CLAUDE.md: fluxul nou documentat

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

vfp_filemap.ps1

@@ -11,6 +11,7 @@
 $script:VfpFileMap = @{
     '.vcx' = @('.vct', '.vc2'); '.scx' = @('.sct', '.sc2'); '.frx' = @('.frt', '.fr2')
     '.lbx' = @('.lbt', '.lb2'); '.mnx' = @('.mnt', '.mn2'); '.dbc' = @('.dct', '.dc2')
+    '.pjx' = @('.pjt', '.pj2'); '.dbf' = @('.fpt', '.db2')
 }
 
 function Get-VfpBinExtensionForTextExtension {