feat(cli): add --verbose flag for detailed operation output

[breferrari]

Context

Weave currently uses env_logger with RUST_LOG for debug output. There is no user-friendly --verbose / -v flag on any command. Security features like checksum verification and schema version checks log at debug level, but users have no easy way to see this output.

Proposal

Add a --verbose / -v global flag to the CLI that sets log level to debug for the weave module. This would surface:

• Checksum verification success messages
• Schema version checks
• Registry fetch details
• Adapter apply details

Acceptance criteria

• weave install --verbose foo shows debug-level output
• Works on all subcommands (global flag)
• Does not require setting RUST_LOG environment variable