Move all specific branch routes before /branches/{name} to prevent
route shadowing. Previously, routes like /branches/rename, /branches/move,
/branches/upstream, /branches/diff, etc. were shadowed by /branches/{name}.
Move specific routes (/commits/reflog, /commits/branches, /commits/tags)
before parameterized routes (/commits/{oid}) to avoid route shadowing.
Previously, /commits/reflog was matched by /commits/{oid} with oid="reflog",
causing InvalidOid("reflog") errors.
Also fixes other potential route shadowing issues in commit routes.
