fix: kb page references by title, not by moved path; Iteration and Cost Limits cites existing sections (#147 follow-up)

gates.md named kb/concepts/<Title>.md for two pages that live under
kb/concepts/workflows/; run_budget.py carried the same stale path. The
concept page pointed at AGENTS.md sections that do not exist, the same
defect #147 fixed in the refusal messages.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SnAJ7Z3CpVD3PRbN73QtU2

Files changed:
- CHANGES.md
- VERSION
- instructions/gates.md
- kb/concepts/INDEX.md
- kb/concepts/workflows/Iteration and Cost Limits.md
- kb/index.md
- kb/log.md
- tools/chemenu/commands/run_budget.py

tools/chemenu/commands/run_budget.py

@@ -43,7 +43,8 @@ LOCK_FILE = STATE_DIR / "budget.lock"
 # a simple task, ~20-35 for a complex multi-tool workflow such as an ingest.
 #
 # The upper band used to read 15-25, taken from an industry rule of thumb (see
-# kb/concepts/Iteration and Cost Limits.md, which still cites it as such). Four
+# the "Iteration and Cost Limits" concept page in kb/, which still cites it as
+# such - deliberately, as a sourced claim about the field). Four
 # consecutive real ingests measured 24, 26, 29 and 30 calls - every one of them
 # at or above the old band's ceiling while doing nothing unusual. A guideline
 # that the normal case exceeds is not a guideline; it teaches an agent that the