Add model embeddings for Z-factor DoF, separate from SaturatedController.

Fixed/Free Probe calibration now emits embeddings[] (unknown + equation) instead of controls[], keeping SaturatedController for physical regulation only.

Co-authored-by: Cursor <cursoragent@cursor.com>

.entropyk/modules/calibration.ekmod

@@ -24,10 +24,8 @@
       "flipV": false,
       "name": "cond",
       "params": {
-        "__fixed_calib_sdt_c": false,
         "__fixed_z_dp": true,
         "__fixed_z_ua": true,
-        "calib_sdt_c": 40,
         "channel_spacing_mm": 1.5,
         "chevron_angle_deg": 60,
         "correlation": "Longo2004",
@@ -43,7 +41,6 @@
         "refrigerant": "R134a",
         "secondary_fluid": "Water",
         "target_subcooling_k": 5,
-        "ua": 2500,
         "z_dp": 1,
         "z_ua": 1
       },
@@ -70,10 +67,8 @@
       "flipV": false,
       "name": "evap",
       "params": {
-        "__fixed_calib_sst_c": false,
         "__fixed_z_dp": true,
         "__fixed_z_ua": false,
-        "calib_sst_c": 5,
         "channel_spacing_mm": 1.5,
         "chevron_angle_deg": 60,
         "correlation": "Longo2004",
@@ -89,7 +84,6 @@
         "refrigerant": "R134a",
         "secondary_fluid": "Water",
         "target_superheat_k": 5,
-        "ua": 2000,
         "z_dp": 1,
         "z_ua": 1
       },
@@ -166,10 +160,9 @@
       "flipV": false,
       "name": "SST probe",
       "params": {
-        "__fixed_target": true,
+        "__fixed_tsat_c": true,
         "fluid": "R134a",
-        "measure": "SST",
-        "target": 5.9
+        "tsat_c": 4.4
       },
       "rotation": 0,
       "type": "Probe"