chore(catalog): bump repo-standard v0.3.0 -> v0.5.0

Ref bump requested by repo-standard (two coord messages: v0.4.0 then
v0.5.0, superseding). Stat line re-measured at the v0.5.0 tag per the
badge-mirroring rule: checks table unchanged at 14, tests 111 -> 135
(node --test on a git-archive extraction of the tag, "ℹ tests" not
"ℹ pass"). check-versions.mjs: 12 OK / 0 WARN / 0 ERROR / 0 SKIP.

.claude-plugin/marketplace.json

@@ -114,7 +114,7 @@
       "source": {
         "source": "url",
         "url": "https://git.fromaitochitta.com/open/repo-standard.git",
-        "ref": "v0.3.0"
+        "ref": "v0.5.0"
       },
       "description": "Per-repo gate for the open/ presentation standard: README first screen, install block, files required by the repo's class, and dead repo references."
     }

README.md

@@ -199,7 +199,7 @@ A local mailbox for coordination between Claude Code sessions in different repos
 
 ---
 
-### [repo-standard](https://git.fromaitochitta.com/open/repo-standard) `v0.3.0`
+### [repo-standard](https://git.fromaitochitta.com/open/repo-standard) `v0.5.0`
 
 Per-repo gate for the open/ presentation standard: README first screen, install block, files required by the repo's class, and dead repo references.
 
@@ -209,7 +209,7 @@ Per-repo gate for the open/ presentation standard: README first screen, install
 - **The class decides what is required** — plugin, catalog, shared-asset, standalone and org-profile each get their own install form and required files, so a five-line org profile is not measured against a plugin's bar
 - **It records, it does not fix** — findings first, remediation afterwards
 
-1 skill · 14 checks · 111 tests · [Full documentation →](https://git.fromaitochitta.com/open/repo-standard)
+1 skill · 14 checks · 135 tests · [Full documentation →](https://git.fromaitochitta.com/open/repo-standard)
 
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