ddn connector-link update --add-all-resources: Add verbose flag

### Component

### Is your proposal related to a problem? ### Describe the solution you'd like

ddn connector-link update my_pg \
--subgraph my_subgraph/subgraph.yaml \
--env-file my_subgraph/.env.my_subgraph.local \
--add-all-resources

if let's say I have 1000 models, it will populate my CLI with all those messages. In fact it should just return with a summary - X models added, Y commands added and Z relationships. If the user wants to see details they can add --verbose flag to the command

Locate the `ddn connector-link update` CLI entry point and reproduce the `--add-all-resources` behavior with a large set of models. Make the default output a summary of models, commands, and relationships, while `--verbose` retains the detailed output; verify both command modes with the CLI's existing tests.

Written by the indexing model from the issue text.