feat(train): V5 parameterized training pipeline — Karman + Illusion verified

Calibration-driven, no_bias only, 2000x600 grid. All cases share unified
env/train/calibrate pattern. Multi-GPU server deployment ready.

Core additions:
- calibrate.py: Phase 0 calibration (karman/illusion), produces
  calibration.json with rounded FORCE_SCALE, SENS_SCALE, SIM_BP/VAL
- env_karman.py: parameterized Karman cloak env (calibration + config_path)
- env_illusion.py: illusion env with FFT harmonics target (S_DIM=14)
- env_vortex.py: vortex cloaking env (lamb/taylor, MAX_STEPS=150)
- train_karman.py, train_illusion.py: parameterized training scripts
- launch_multi.sh: sequential multi-GPU launcher (7-min staggered)
- SERVER_DEPLOY.md: complete server setup, calibration, training guide
- calibrations/re100/ & calibrations/illusion_1L/: pre-run calibrations

Fixes:
- SIM_VAL[-1] 0.95 -> 1.0 (r_sim maps to full [0,1] range)
- Cross-Re configs: re50/200/400 (viscosity-only variants)

Verified end-to-end on GPU0+GPU1:
- Karman V5 20-ep: best reward 0.459 at Ep16 (monotonic rise)
- Illusion 20-ep: best reward 0.224 at Ep19 (harmonics, DTW learning)

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

configs/config_lbm_karman_2000x600_re200.json

@@ -0,0 +1,50 @@
+{
+    "_doc": "Karman Cloak Re200: uniform inlet, free-slip walls, 2000x600 grid. Pinball centered.",
+    "grid": {
+        "lattice_model": "D2Q9",
+        "nx": 2000,
+        "ny": 600,
+        "nz": 1
+    },
+    "physics": {
+        "data_type": "FP32",
+        "viscosity": 0.002,
+        "velocity": 0.01,
+        "rho": 1.0
+    },
+    "method": {
+        "collision": "MRT",
+        "streaming": "double_buffer",
+        "store_precision": "FP32",
+        "ddf_shifting": false,
+        "les": {
+            "enabled": false,
+            "cs": 0.16,
+            "closed_form": true
+        },
+        "trt": {
+            "magic_param": 0.1875
+        },
+        "inlet": {
+            "profile": "uniform",
+            "scheme": "regularized",
+            "trt_neq_damp": 0.5,
+            "regularized_neq_damp": 0.5
+        },
+        "outlet": {
+            "mode": "neq_extrap",
+            "backflow_clamp": true,
+            "blend_alpha": 0.7,
+            "srt_neq_damp": 0.5
+        },
+        "y_wall_bc": "free_slip",
+        "omega_guard": {
+            "min": 0.01,
+            "max": 1.99
+        }
+    },
+    "cuda": {
+        "threads_per_block": 256,
+        "compute_capability": "auto"
+    }
+}