chore(make): show the dev database before starting the backend

[nabramovitz]

With SQLite, jetstream opens $SQLITE_DB_DIR/console-database.db relative to the directory it starts in, so every checkout has its own endpoints, tokens and favourites, and nothing says which file is open. Switching worktrees, or moving between make dev backend and an E2E run (dist/e2e-db, rebuilt each run), silently swaps the endpoint set.

make dev backend now prints the database before it starts the backend:

Backend database: /…/src/jetstream/console-database.db
  SQLite, kept between restarts
  Endpoints (3):
    cf                           cf         https://api.example.com
    github                       git        https://api.github.com
    k3d                          k8s        https://127.0.0.1:49662

• Settings resolve as jetstream reads them for a dev run: the environment first, then src/jetstream/config.properties (DATABASE_PROVIDER, SQLITE_DB_DIR, SQLITE_KEEP_DB).
• SQLITE_KEEP_DB false prints "RESET at startup"; a missing file or directory says so; PostgreSQL and MySQL print the provider, host and database name.
• The database is opened read-only with sqlite3; without sqlite3 only the path is printed.
• The logic is in build/dev-db-info.sh (shellcheck clean), called by one line in dev.backend.

Tried with make dev backend in this checkout, with E2E settings (SQLITE_DB_DIR=../../dist/e2e-db SQLITE_KEEP_DB=false), from another checkout, and with DATABASE_PROVIDER=pgsql.

Changelog fragment: changelog.d/0007-dev-db-info.md.

AI disclosure (RFC-0047): prepared with AI coding assistance; reviewed by the author.

[norman-abramovitz]

LGTM