Seed flavor and depends_on on new workplan files.

CUST-WP-0072-T03: scaffold, workplan create, and rapp bootstrap templates
include flavor: planning and depends_on.

Assistant: grok
Assistant-Session: 01a09dc1-b21e-77e1-919e-fcad2f82b267

src/repo_manager/commands/scaffold.py

@@ -164,6 +164,8 @@ def scaffold_repository(
                 f"domain: {domain}\n"
                 f"repo: {slug}\n"
                 "status: proposed\n"
+                "flavor: planning\n"
+                "depends_on: []\n"
                 "---\n\n"
                 "# Foundation\n\n"
                 "```task\n"