chore(cleanup): remove the June trials, orchestrator docs, dormant agent, caller-less code and the fix-round chain

R4-R7 of the cleanup list (decision 188): the June trial docs and
fixtures, the three orchestrator reference docs, the dormant
synthesis-agent, code with no caller (project-discovery, bash-normalize,
fidelity-diff, test-census, the next-session prompt validator, arm B and
the --workflow flag) and the fix-round chain. Living docs repointed; the
reasons for in-session orchestration and the all-opus pin are now written
in docs/architecture.md and docs/profiles.md.

New tests/lib/living-paths.test.mjs: living tracked text names only
plugin paths that exist (seen red with 22 dead pointers before this
commit). docs/T1-cc26-delegated-orchestration.md and
lib/review/gold-scorer.mjs stay until R-b: the frozen end-state registry
names them.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

examples/02-real-cli/REGENERATED.md

@@ -11,8 +11,7 @@
 ## What this example demonstrates
 
 `examples/02-real-cli/` is the first **runnable** trekplan example.
-Unlike `examples/01-add-verbose-flag/` (which ships a frozen brief, plan,
-and research as artifacts but no executable code), this example ships a
+It ships a
 working ~80-line Node.js CLI (`tally`), a passing test suite, and known
 fixture data — all designed to be the input for a real pipeline run.