kill: purge old-paradigm dist/platform binaries from tree

The generated C, amalgams, vendored runtime pins, and compiled binaries
from the Claude Code era are removed from the worktree. The El sources
survive; this tree is now source-only for the first-principles rebuild.

Per Principal direction 2026-08-19.

docs/experiments/instruments/instrument/plot/reference/KNOWN-SERIES.WORKING

@@ -0,0 +1,17 @@
+Known properties of KNOWN-SERIES.tsv, derived by hand from the five rows above.
+
+  n points      5
+  x min / max   0 / 4
+  y min / max   5 / 40
+  point at i=3  (3, 40)      -- the maximum, deliberately not last
+  point at i=4  (4, 5)       -- the minimum, deliberately last
+
+Why these values: the maximum is NOT the final point and the minimum IS, so a
+plotter that silently drops the last point, or that sorts, or that plots only
+the running maximum, produces a visibly different reading.
+
+ANTI-TRUNCATION: with y ranging 5..40, a plotter left to autoscale will start
+the y-axis near 5 and make a 3.5x visual change out of an 8x numeric one. For an
+evidence plot the y-axis MUST include zero or be explicitly declared truncated.
+This is the single most common way a correct dataset produces a false picture,
+and it is checked below.

docs/experiments/instruments/instrument/plot/reference/KNOWN-SERIES.tsv

@@ -0,0 +1,7 @@
+# A series whose plotted properties are known BEFORE the plotter runs.
+# x	y
+0	10
+1	20
+2	15
+3	40
+4	5