chore(db): add sqlite-init and sqlite-seed wrappers, update ticket skill

Complete the set of whitelistable wrapper scripts so all SQLite
access goes through db/connectors/sqlite-* (query, exec, init, seed).
Update the ticket skill to reference wrappers instead of calling
sqlite_connector.py directly, making permissions allowlisting clean.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

db/connectors/sqlite-init

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+# Initialise the ticketing database from schema.sql. Whitelistable command.
+# Usage: sqlite-init
+exec python3 "$(dirname "$0")/sqlite_connector.py" init "$@"

db/connectors/sqlite-seed

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+# Seed the ticketing database with initiatives from DECISIONS.md. Whitelistable command.
+# Usage: sqlite-seed
+exec python3 "$(dirname "$0")/sqlite_connector.py" seed-decisions "$@"