fix: handle Firebird Decimal and datetime types in JSON serialization

- PRECIO and VALORTOTAL are Decimal from fdb driver; convert via _safe_num()
- HORAINICIORECEPCION is a datetime object; use _fmt_hora_str() for HH:MM:SS
- _parse_hora() now handles datetime objects directly (no str() roundtrip)
- Same fixes applied to pacientes.py exam builder
- sync-now endpoint catches exceptions and returns traceback as JSON

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

app/routes/pacientes.py

@@ -113,10 +113,12 @@ async def examenes_paciente(request: Request, cedula: str = ""):
     def parse_hora(raw) -> datetime | None:
         if not raw:
             return None
+        if isinstance(raw, datetime):
+            return ahora.replace(hour=raw.hour, minute=raw.minute, second=raw.second, microsecond=0)
         s = str(raw)
         try:
-            if "T" in s:
-                dt = datetime.fromisoformat(s)
+            if len(s) > 10 and (s[10] == "T" or s[10] == " "):
+                dt = datetime.fromisoformat(s.replace(" ", "T"))
                 return ahora.replace(hour=dt.hour, minute=dt.minute, second=dt.second, microsecond=0)
             partes = s.split(":")
             return ahora.replace(hour=int(partes[0]), minute=int(partes[1]),
@@ -124,6 +126,24 @@ async def examenes_paciente(request: Request, cedula: str = ""):
         except Exception:
             return None
 
+    def safe_num(val):
+        if val is None:
+            return None
+        try:
+            return float(val)
+        except Exception:
+            return None
+
+    def fmt_hora_str(val) -> str:
+        if not val:
+            return ""
+        if isinstance(val, datetime):
+            return val.strftime("%H:%M:%S")
+        s = str(val)
+        if len(s) > 10 and (s[10] == "T" or s[10] == " "):
+            return s[11:19]
+        return s[:8]
+
     examenes = []
     for row in rows:
         hora_dt = parse_hora(row.get("HORAINICIORECEPCION"))
@@ -131,16 +151,16 @@ async def examenes_paciente(request: Request, cedula: str = ""):
             continue
         examenes.append({
             "recepcion_id":        row.get("IDRECEPCION"),
-            "hora":                row.get("HORAINICIORECEPCION"),
+            "hora":                fmt_hora_str(row.get("HORAINICIORECEPCION")),
             "cod_examen":          (row.get("COD_EXAMEN") or "").strip(),
             "nombre":              (row.get("NOM_EXAMEN") or "").strip(),
             "cups":                (row.get("CUPS") or "").strip(),
-            "precio":              row.get("PRECIO"),
+            "precio":              safe_num(row.get("PRECIO")),
             "diagnostico_cod":     (row.get("DIAG_PPAL") or "").strip(),
             "diagnostico_nombre":  (row.get("DIAG_CONCEPTO") or "").strip(),
             "medico_docidmedico":  (row.get("DOCIDMEDICO") or "").strip(),
             "nit_empresa":         (row.get("NIT_EMPRESA") or "").strip(),
-            "valor_total":         row.get("VALORTOTAL"),
+            "valor_total":         safe_num(row.get("VALORTOTAL")),
         })
 
     return JSONResponse({"ok": True, "examenes": examenes})