feat(sync): already_imported tracking, invoice cache, path fixes, remove vfp

- Track already_imported/new_imported counts separately in sync_runs
  and surface them in status API + dashboard last-run card
- Cache invoice data in SQLite orders table (factura_* columns);
  dashboard falls back to Oracle only for uncached imported orders
- Resolve JSON_OUTPUT_DIR and SQLITE_DB_PATH relative to known
  anchored roots in config.py, independent of CWD (fixes WSL2 start)
- Use single Oracle connection for entire validation phase (perf)
- Batch upsert web_products instead of one-by-one
- Remove stale VFP scripts (replaced by gomag-vending.prg workflow)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

api/.env.example

@@ -35,14 +35,16 @@ APP_PORT=5003
 LOG_LEVEL=INFO
 
 # =============================================================================
-# CALE FISIERE (relative la project root - directorul gomag/)
+# CALE FISIERE
+# Relative: JSON_OUTPUT_DIR la project root, SQLITE_DB_PATH la api/
+# Se pot folosi si cai absolute
 # =============================================================================
 
-# JSON-uri descarcate de VFP
-JSON_OUTPUT_DIR=vfp/output
+# JSON-uri comenzi GoMag
+JSON_OUTPUT_DIR=output
 
 # SQLite tracking DB
-SQLITE_DB_PATH=api/data/import.db
+SQLITE_DB_PATH=data/import.db
 
 # =============================================================================
 # ROA - Setari import comenzi (din vfp/settings.ini sectiunea [ROA])