Keep the architecture infospace out of the governing inventory

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

source-inventory.config.json

@@ -114,7 +114,7 @@
       "branch": "main",
       "remote": "https://forgejo.coulomb.social/coulomb/the-custodian.git",
       "selectors": [
-        "canon/architecture/**",
+        "canon/architecture/*.md",
         "canon/constitution/**",
         "canon/standards/**"
       ]
@@ -135,6 +135,11 @@
       "repository": "the-custodian",
       "path": "canon/projects",
       "reason": "Project material is not governing canon for this publication surface."
+    },
+    {
+      "repository": "the-custodian",
+      "path": "canon/architecture/infospace",
+      "reason": "Pointer index for retrieval; not a governing document."
     }
   ]
 }