Initial commit: grid-based multi-photon reconstruction

Code, configs, charge LUTs, best.pth and evaluation records for each
training run, the knife-edge / Siemens-star / XRF notebooks with
outputs, and the overnight run reports. Epoch checkpoints, inference
results and HTML exports stay local (see .gitignore).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Configs/generate_frames_poly_Moench014.yaml

@@ -0,0 +1,66 @@
+# GridBased frame generation -- polychromatic 5-30 keV, MOENCH014 @150 V (WP1.2)
+#
+# Every photon gets its own energy, its own conversion depth from that energy's
+# attenuation length, and the charge cloud that the alpha(E, t) / beta(E, t)
+# table gives for the resulting drift time.  The single-energy stamp-reuse path
+# is untouched and still lives in generate_frames_12keV.yaml.
+
+meta:
+  sensor: Moench014
+  hv: 150                     # V
+  pixel_size_um: 25
+  sensor_thickness_um: 320
+  depletion_voltage: 29.6     # V
+  temperature: 307.8          # K, = 273 + 20.0 + 14.8
+
+generation:
+  mode: lut
+  lut: data/charge_lut_Moench014_150V.npz
+
+spectrum:
+  # flat, so the regression carries no spectral prior of its own; the table
+  # covers 5-30 keV, and sampling to its edges means the outermost ~1 keV
+  # regresses with a one-sided prior
+  train: {mode: flat, min: 5.0, max: 30.0}
+  val:   {mode: flat, min: 5.0, max: 30.0}
+  test:  {mode: flat, min: 5.0, max: 30.0}
+  eval:  {mode: flat, min: 5.0, max: 30.0}
+
+frame:
+  size: 32
+  margin: 4
+
+noise:
+  pixel_keV: 0.13
+  common_mode_row_keV: 0.0
+  common_mode_col_keV: 0.0
+
+edge_augmentation:
+  fraction: 0.08
+
+output:
+  folder: /mnt/sls_det_storage/moench_data/MLXID/Samples/GridBased/poly5to30keV_Moench014_150V
+
+splits:
+  train:
+    n_shards: 12
+    frames_per_shard: 100_000
+    occupancy: {mode: loguniform, min: 0.002, max: 0.10}
+  val:
+    n_shards: 2
+    frames_per_shard: 40_000
+    occupancy: {mode: loguniform, min: 0.002, max: 0.10}
+  test:
+    n_shards: 2
+    frames_per_shard: 40_000
+    occupancy: {mode: loguniform, min: 0.002, max: 0.10}
+
+eval_scan:
+  occupancies: [0.005, 0.01, 0.02, 0.05, 0.10]
+  frames_each: 8_000
+  stamp_files: [0, 1]
+  edge_fraction: 0.0
+
+runtime:
+  n_workers: 14
+  seed: 20260901