Log fleet_k_q48/fleet_conserved; K holds exactly, 775/775 ticks (FABRIC-3.md §XVIII)

doe_log.c's per-heartbeat-tick CSV gains two columns: fleet_k_q48
(vm_physics_fleet_heat_sum() over ALL live VMs -- the genuine fleet-wide
conservation invariant K, not reconstructable from the 3 named-Tripod-
member heat columns already logged, which omit every identity VM's own
heat) and fleet_conserved (vm_physics_conserved() as 0/1). Requested
explicitly after the first heartbeat-telemetry analysis pass
(analysis-20260912/) omitted K entirely.

Kernel rebuilt on all three architectures, full 3x9x3 campaign rerun
(results-20260912-with-k/). K = 1.0000000000 (Q48.16 raw 65536) on every
one of 775 heartbeat-tick observations, sd(K) = 0, 100% fleet_conserved,
across amd64/aarch64/riscv64, nine identities, three replicates -- zero
deviation. Also a free regression check on both recent Stadium fixes
(§XVI/§XVII): neither disturbed the reservoir-transfer accounting K
depends on.

Found and fixed a tooling wrinkle along the way: fleet_conserved, being
the CSV row's very last field with nothing after it to bound a regex
match, can have a resumed trial digit merge into it with zero separator
on the wire -- combine.py now derives it from fleet_k_q48 directly (same
epsilon vm_physics_conserved() uses) instead of trusting the raw field.
fleet_k_q48 itself is unaffected either way.

Full analysis, discussion, and light/dark SVG->PDF figures written up as
a proper LaTeX report (report-20260912/report/std79_doe_report.pdf),
following experiments/bare_metal/analysis/report/bare_metal_doe_report.tex's
established style -- supersedes analysis-20260912/'s markdown-only first
pass as the primary deliverable for this dataset (kept, not discarded).

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

experiments/std79-doe/std79-doe.fth

@@ -164,10 +164,11 @@ VARIABLE CURR-RUN-ID
   N-TESTS 0 DO I RUN-TEST LOOP ;
 
 ( HB-ON/HB-OFF (doe_log.c) bracket the trial loop below so the per-tick )
-( DoE-tagged physics/heartbeat CSV -- 18 columns: tick_number, elapsed_ns, )
+( DoE-tagged physics/heartbeat CSV -- 20 columns: tick_number, elapsed_ns, )
 ( hot_word_count, avg_word_heat_q48, window_width, apic_ticks, )
-( hera/hermes/artemis heat_q48, etc. -- covers exactly this run's window, )
-( not the whole boot. g_doe_log_enabled defaults OFF (doe_log.c), so )
+( hera/hermes/artemis heat_q48, fleet_k_q48, fleet_conserved, etc. -- )
+( covers exactly this run's window, not the whole boot. )
+( g_doe_log_enabled defaults OFF (doe_log.c), so )
 ( every prior campaign run's extracted CSV (scripts/extract_doe.sh, run )
 ( automatically at the end of every `make qemu`) was silently empty; )
 ( without this bracket there is no per-tick data to analyze the 3x9x3 )