repository: add waitfordb repo

waitfordb is a small Go tool shipped as a container image, used as a Kubernetes
initContainer to block an app from starting until its database is ready. It
replaces the hand-written psql-in-a-shell init steps on the arrstack.

Creates the unkin/waitfordb Gitea repo (Go tool settings mirroring node-lookup:
public, squash merges, delete branch after merge). branch_protection is omitted
on creation to avoid requiring Woodpecker status checks that do not exist until
the first pipeline runs; it will be added in a follow-up PR once CI is green.

config/git.unkin.net/unkin/repository/waitfordb.yaml

@@ -0,0 +1,9 @@
+description: "A small Go tool, shipped as a container image, used as a Kubernetes initContainer to block an app from starting until its database is ready."
+private: false
+default_branch: "main"
+default_delete_branch_after_merge: true
+default_merge_style: "squash"
+# branch_protection is intentionally omitted on creation: the required Woodpecker
+# status checks do not exist until the repo is created and its first pipeline
+# runs, so requiring them up front would block the very first PR. Add protection
+# in a follow-up PR (mirroring node-lookup.yaml) once CI is green.