docs(diagnostics): R29 low-baseline step-response — hedonic asymmetry is emergent

forseti (P0.239) + mimir (P0.615) ±impulse step-response resolves the lofn
ceiling confound. Findings: decay tau symmetric across signs (~0.9/turn);
raw impulse gain ~symmetric near neutral (forseti +0.034 vs -0.034); the
Frijda 'negatives loom larger' is emergent from the neutral anchor x non-zero
baseline interaction, not a primitive. Calibration fork answer: neither
asymmetric-decay nor negative-bias primitive is warranted — the levers are
overall gain + the neutral anchor.

docs/diagnostics/r29-pad-step-mimir-neg.csv

@@ -0,0 +1,13 @@
+drive,sent,reflects_after,P,A,D,emotions
+1,impulse_neg,baseline,0.615,-0.438,0.304,
+2,neutral_1,impulse_neg,0.615,-0.438,0.304,love=0.872
+3,neutral_2,neutral_1,0.4612,-0.3055,0.2676,love=0.787; disgust=0.767
+4,neutral_3,neutral_2,0.4162,-0.2757,0.2415,love=0.741; disgust=0.723
+5,neutral_4,neutral_3,0.3756,-0.2488,0.218,love=0.714; disgust=0.696
+6,neutral_5,neutral_4,0.339,-0.2245,0.1967,love=0.684; disgust=0.667
+7,neutral_6,neutral_5,0.2907,-0.1925,0.1687,love=0.639; disgust=0.622
+8,neutral_7,neutral_6,0.2761,-0.1829,0.1602,love=0.626; disgust=0.61
+9,neutral_8,neutral_7,0.2249,-0.149,0.1305,love=0.576; disgust=0.561
+10,neutral_9,neutral_8,0.2492,-0.1237,0.1329,love=0.556; disgust=0.542; joy=0.603
+11,neutral_10,neutral_9,0.2368,-0.1175,0.1262,love=0.526; disgust=0.512; joy=0.57
+12,settle_probe,neutral_10,0.2249,-0.1117,0.1199,love=0.511; disgust=0.498; joy=0.554