Keep the architecture infospace out of the governing inventory

Top-level canon/architecture/*.md is enough; pointer files are retrieval
only.

docs/adr-review/SUMMARY.md

@@ -1,13 +1,13 @@
 # ADR review ledger summary
 
-Rows: 144
+Rows: 142
 
 ## Inventory dispositions
 
 - `excluded`: 3
 - `metadata-pending`: 93
 - `published`: 38
-- `unsupported-format`: 10
+- `unsupported-format`: 8
 
 ## Proposed dispositions
 
@@ -15,7 +15,7 @@ Rows: 144
 - `local`: 36
 - `publish`: 82
 - `superseded`: 5
-- `unreviewed`: 16
+- `unreviewed`: 14
 
 ## Front-matter `id` collisions