feat(scheduler-sim-decision-trace): render trace records to text

Task 4.1: hierarchy, summary-level position summaries, truncation marker
with the fixed totals block, 50-host outcome cap with aggregates and
separate limit charges, no-decision and reconstructed records, amounts
in the REPL units mode, identical bytes to one or two sinks.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/scheduler/meson.build

@@ -29,6 +29,8 @@ scheduler_srcs = [
   'src/repl_break.c',
   'src/repl_info.c',
   'src/repl_params.c',
+  'src/repl_trace_render.c',
+  'src/repl_trace_render_outcome.c',
   'src/schedobj.c',
   'src/plugin.c',
   'src/resource.c',