chore(gitea-local-fork): bump to v1.26.0-unstable-2026-05-16

Clean release pin (drops the -debug instrumentation build). Carries
the project-board SSE detach-ctx fix (#8) + milestone progress SSE
(#14). rev 9f588d3dd3 = squash-merge on oleks/main. pnpmDeps.hash +
vendorHash verified unchanged.

packages/gitea-local-fork.nix

@@ -35,12 +35,12 @@
 
 let
   pname = "gitea-local-fork";
-  version = "1.26.0-unstable-2026-05-15.1-debug";
+  version = "1.26.0-unstable-2026-05-16";
 
   src = fetchgit {
     url = "https://git.oleks.space/oleks/gitea.git";
-    rev = "bfc10289e60af9a1b7ab976143df559b16805cb7";
-    hash = "sha256-KzdwnXJq5APTaPBGBpI0uTNxfl7UcXmLJiCeNrXAc+k=";
+    rev = "9f588d3dd32b93d0b7d72c0a7bf78b8761693650";
+    hash = "sha256-Z1I0DCm7Uymsq5GX+w6uG2DYxuinQEwArShwtrJTzNo=";
   };
 
   # Gitea's package.json requires pnpm >= 11; nixpkgs ships pnpm 10. The