Create graphs from a subset of lab topology

[ipspace]

This commit adds the '--include' and '--exclude' parameters to the 'netlab graph' command. These parameters can be used to include or exclude nodes or links from the lab topology and thus create graphs from a subset of the overall topology.

[Copilot]

Pull request overview

This PR adds --include and --exclude parameters to the netlab graph command, enabling users to create graphs from subsets of lab topology nodes and links based on modules, roles, or custom graph classes.

Changes:

• New CLI parameters (-i/--include and -x/--exclude) for filtering topology elements
• Core filtering logic that matches against node modules, link roles, and graph.class attributes
• Schema extensions to support graph.class attribute on nodes and links
• Comprehensive test coverage with multiple filtering scenarios

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
netsim/cli/graph.py	Adds CLI argument parsing for include/exclude parameters with validation
netsim/outputs/_graph.py	Implements two-phase filtering algorithm: marking items then removing orphaned connections
netsim/outputs/graph.yml	Extends schema to support graph.class attribute as list of strings on nodes and links
docs/netlab/graph.md	Documents new filtering parameters with usage examples and behavior explanation
tests/platform-integration/graph/05-include-exclude.yml	Adds integration tests for exclude by class and include by module/role

[ipspace]

You asked for it @a-v-popov ;)