feat(glossary): add optional paths.glossary standing-reading slot

Pins canonical nomenclature per project so terminology does not drift
and LLM-driven work reuses the established term instead of coining a
synonym each session. The glossary rides the existing standing-reading
mechanism — one optional path slot, no new delivery path.

Single-sourcing, to avoid cross-doc drift:
- `paths.glossary` row in profile-schema.md owns the "set => standing
  reading for every role; unset => no-op" semantics; agent-template.md
  and pipeline.md each carry one referencing sentence, not a restatement.
- glossary-convention.md owns the format (flat per-term blocks: canonical
  heading + Avoid line + <=2-sentence definition) and the boss
  record-reality-never-invent write-rule; boss/SKILL.md only points to it.
- glossary.md dogfoods the format on the plugin's own vocabulary
  (cycle, milestone, iteration, drift, hard-gate).

Write authority: user any time; boss autonomously but only to record
terms already in consistent use or to settle a drift it just resolved —
never to coin. All other roles are read-only consumers.

No executable surface; this repo has no test runner, so each task closed
on a grep presence-assertion against the file it touched. All eight gates
green (T1 3>=3, T2 5, T3 2, T4 1, T5 1, T6 1, T7 2, final sweep present).

Implements docs/specs/2026-05-31-glossary-integration-design.md.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

boss/SKILL.md

@@ -125,6 +125,11 @@ For each dispatched skill's result, decide:
   fieldtest green and stays a deliberate manual act (see
   `../docs/pipeline.md` § Milestone-close gate).
 
+If a term-drift is resolved during the loop — two names collapsed to
+one, or a settled term not yet listed — record it in the project
+glossary per `../docs/glossary-convention.md`: record reality, never
+invent. This is the only glossary write authority outside the user.
+
 ### Step 5 — On done-state: Notify
 
 Run the procedure named in "Done-state notifications" below.
@@ -286,6 +291,8 @@ actionable ask, not a wrap-up summary.
   authority over skills, feature acceptance, RED-first for bugs.
 - **Queue:** the URL configured under `git.issue_tracker.url` in
   the profile; CLI command at `git.issue_tracker.list_cmd`.
+- **Glossary write-rule:** `../docs/glossary-convention.md` —
+  record-reality discipline for the only autonomous glossary writer.
 - **Downstream skills dispatched:** `../brainstorm`,
   `../planner`, `../implement`, `../audit`, `../fieldtest`,
   `../debug`, `../docwriter`.