fix(esopull): correct init layout and pre-streaming semantics (v0.5.1)

EsoPull curved boundaries and wall BCs now use consistent backing-layout
reads; InitEsoPull writes equilibrium in t=0 EsoPull layout. Cache N_OBJS
after compile and atomic config header writes to avoid parallel races.
Adds config screening tools, flume configs, and FP16S/EsoPull diagnosis doc.

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

tests/specs/exp_ctrl_matrix.md

@@ -31,13 +31,13 @@ SIGNAL_FEATURES1 = {
         ]
     },
     'action2': {
-        'mean': -0.01806,
+        'mean': -0.022575,  # s125: 1.25 × reference 0.01806 m/s
         'components': [
             (0.1354, 0.0, 2.099),
         ]
     },
     'action3': {
-        'mean': 0.01806,
+        'mean': 0.022575,
         'components': [
             (0.1354, 0.0, 1.639),
         ]