fix(docs): fix audit closure format — move 'Plans green.' to intro paragraph

Per the file's established convention (lines 61, 85, 105, 242), plan
closure sentences belong in the ## Audit intro paragraph, not inside
the ### tax subsection. Also remove the novel inline ✅ markers on
tax bullet items — the 'Plans X green.' prose is the sole closure signal.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TUPbs2Vx7sDMnA5gbx5HrW

Author: claude

docs/development/architecture-audit.md

@@ -249,25 +249,24 @@ fixes (map→struct, fmt→strconv); type-6 tag
 gap fix; plan-2606241814/15 test additions.
 No new production functions, DIP, SRP, or
 line-count violations.
+Plans 2606260211, 2606260614, 2606260615 green.
 
 ### tax (2026-06-26)
 
-Plans 2606260211, 2606260614, 2606260615 green.
-
 - `internal/lint/layer0_html.go` — seven
   helpers lack dedicated tests. File entered
   the touched set via a perf commit. Tests doc
   §"every function by name" —
-  [plan/2606260211][2606260211]. ✅
+  [plan/2606260211][2606260211].
 
 - `internal/lint/lineclass_scan.go` — 9
   unexported helpers lack tests.
   Sub-functions of `htmlType7Start` —
-  [plan/2606260614][2606260614]. ✅
+  [plan/2606260614][2606260614].
 
 - `cue/cuelite/engine.go` — 7 unexported
   helpers lack tests —
-  [plan/2606260615][2606260615]. ✅
+  [plan/2606260615][2606260615].
 
 [2606260211]: ../../plan/2606260211_arch-fix-layer0-html-helper-tests.md
 [2606260614]: ../../plan/2606260614_arch-fix-lineclass-scan-helper-tests.md