Rename init-0.4th..init-9.4th to workload-0.4th..workload-9.4th; fix stale WL-HI/WL-LO doc

These are alternate boot personality capsules, not files doe.4th
dispatches from -- confirmed by reading doe.4th itself (it generates
its own synthetic workload internally, DOE-WORK) and mkcapsule.c
(only the exact filename "init.4th" is special-cased as the active
MAMA_INIT capsule). "workload-N.4th" names them for what they are
without colliding with that reserved name.

Renamed the 10 files (git mv, preserving history) and their own
self-referential header comments (also fixed a pre-existing typo,
"init-4.th" -> "workload-4.4th"), updated capsules/README.md,
capsules/MANIFEST.md (21 references), .claude/CLAUDE.md, and a
tools/mkcapsule.c comment.

Also fixed experiments/bare_metal/README.md's "Adding a Custom
Workload Capsule" section, discovered stale while doing this rename:
it documented a WL-HI/WL-LO dispatch table and a wl_id CSV column
that don't exist anywhere in the current capsules/ tree or doe.4th's
own CSV header -- corrected to describe what's actually there (no
pluggable workload dispatch; a custom workload is run by substituting
it in as the boot's own init.4th).

Verified: mkcapsule --lint clean (35 files, 0 violations), all 3
architectures build with zero new warnings, amd64 boots to zuse)ok>
with an unchanged dict_hash/capsule_hash from every prior boot this
session (0xc8f4b09e36f4fc4a / 0x1ef4939ed32ec1e6) and zero faults.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EXieurDfDSsDFdnSyusuWo

capsules/workload-3.4th

@@ -0,0 +1,98 @@
+
+Block 4606
+
+( SINUSOIDAL WAVE WORKLOAD - Smooth oscillation )
+( Approximated via lookup table with random modulation )
+( Randomized amplitude and frequency )
+
+: COMPUTE ( n -- )
+  0 SWAP 0 DO I 7 * + LOOP DROP ;
+
+Block 4615
+( Sine lookup: 16 steps per quarter wave via CASE )
+( sin: 0,10,20,31,41,50,59,67,74,81,87,91,95,98,99,100 )
+: SIN-STEP ( phase -- intensity )
+  15 AND CASE
+  0 OF 0 ENDOF  1 OF 10 ENDOF
+  2 OF 20 ENDOF  3 OF 31 ENDOF
+  4 OF 41 ENDOF  5 OF 50 ENDOF
+  6 OF 59 ENDOF  7 OF 67 ENDOF
+  8 OF 74 ENDOF  9 OF 81 ENDOF
+  10 OF 87 ENDOF  11 OF 91 ENDOF
+  12 OF 95 ENDOF  13 OF 98 ENDOF
+  14 OF 99 ENDOF  15 OF 100 ENDOF
+  ENDCASE ;
+
+Block 4625
+
+( Full sine wave via quarter-wave symmetry )
+
+: FULL-SIN ( phase -- intensity )
+  63 AND
+  DUP 16 < IF SIN-STEP EXIT THEN
+  DUP 32 < IF 31 SWAP - SIN-STEP EXIT THEN
+  DUP 48 < IF 32 - SIN-STEP EXIT THEN
+  63 SWAP - SIN-STEP ;
+
+Block 4635
+( Sinusoidal wave with random amplitude/frequency modulation )
+42 SEED
+: SINE-PULSE ( phase amplitude -- )
+  SWAP FULL-SIN * 100 / 1+
+  COMPUTE ;
+: SINE-CYCLE ( steps base-amp base-wait -- )
+  ROT 0 DO
+    I
+    2 PICK 80 120 RANDOM 100 */
+    SINE-PULSE
+    DUP 80 120 RANDOM 100 */ WAIT
+  LOOP 2DROP ;
+
+Block 4645
+
+( Main sinusoidal wave generator )
+
+: SINE-WAVE ( cycles -- )
+  0 DO
+    64                     ( 64 steps = full wave )
+    70 130 RANDOM          ( randomize amplitude 70-130% )
+    40 80 RANDOM           ( randomize base wait 40-80ms )
+    SINE-CYCLE
+    100 200 RANDOM WAIT    ( inter-cycle pause )
+  LOOP ;
+
+3 SINE-WAVE
+
+Block 4655
+
+( Phase-shifted dual sine - interference pattern )
+
+98765 SEED
+
+: DUAL-SINE ( -- )
+  32 0 DO
+    I FULL-SIN 80 120 RANDOM 100 */
+    I 16 + FULL-SIN 80 120 RANDOM 100 */
+    + 2 / 1+ COMPUTE
+    60 100 RANDOM WAIT
+  LOOP ;
+
+: RUN-DUAL 4 0 DO DUAL-SINE LOOP ;
+RUN-DUAL
+
+Block 4665
+( Damped sine - decaying amplitude )
+11111 SEED
+: DAMPED-SINE ( cycles -- )
+  100 SWAP               ( starting amplitude )
+  0 DO
+    64 0 DO
+      I OVER FULL-SIN * 100 / 1+
+      85 115 RANDOM 100 */ COMPUTE
+      50 80 RANDOM WAIT
+    LOOP
+    85 * 100 /           ( decay by 15% each cycle )
+    DUP 10 < IF DROP 10 THEN
+  LOOP DROP ;
+
+3 DAMPED-SINE