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-pos.csv

@@ -0,0 +1,13 @@
+drive,sent,reflects_after,P,A,D,emotions
+1,impulse_pos,baseline,0.615,-0.438,0.304,
+2,neutral_1,impulse_pos,0.615,-0.438,0.304,
+3,neutral_2,neutral_1,0.615,-0.438,0.304,
+4,neutral_3,neutral_2,0.5916,-0.3831,0.2987,love=0.872
+5,neutral_4,neutral_3,0.4855,-0.3215,0.2817,love=0.826; disgust=0.805
+6,neutral_5,neutral_4,0.4612,-0.3055,0.2676,love=0.787; disgust=0.767
+7,neutral_6,neutral_5,0.3954,-0.2619,0.2295,love=0.73; disgust=0.711
+8,neutral_7,neutral_6,0.3756,-0.2488,0.218,love=0.714; disgust=0.696
+9,neutral_8,neutral_7,0.339,-0.2245,0.1967,love=0.684; disgust=0.667
+10,neutral_9,neutral_8,0.306,-0.2026,0.1776,love=0.655; disgust=0.639
+11,neutral_10,neutral_9,0.2492,-0.1651,0.1446,love=0.617; disgust=0.601
+12,settle_probe,neutral_10,0.2367,-0.1568,0.1374,love=0.581; disgust=0.566