Phase 3: Configuration listing (config service, CLI commands)

[padak]

Implementation Summary

Implements Phase 3 of the Keboola Agent CLI: multi-project configuration listing and detail retrieval. Adds a full ConfigService business logic layer, replaces config command stubs with real Typer CLI commands, adds Rich table output formatters, and wires everything into the CLI context.

Key changes:

• config_service.py (NEW): ConfigService with resolve_projects(), list_configs(), get_config_detail() - supports multi-project aggregation with per-project error handling
• commands/config.py (REPLACED): Full implementation of config list and config detail with filtering, error handling, and dual output modes
• output.py (EXTENDED): format_configs_table() for Rich tables grouped by project, format_config_detail() for detail panels, warning() method
• cli.py (EXTENDED): Wire ConfigService into ctx.obj

Acceptance Criteria

• config list --json returns configs from all projects
• config list --project X returns configs from one project
• config list --project X --project Y returns from both
• config list --component-type extractor filters by type
• config list --component-id X filters by component
• config list human mode shows Rich table grouped by project
• config detail --project X --component-id Y --config-id Z returns detail
• Partial failure: one project errors, others continue
• Unknown alias returns exit code 5

Tests

• uv run pytest tests/ -v - 151 passed (114 existing + 37 new)

New test classes:

• TestConfigServiceListConfigs (13 tests): multi-project aggregation, type filtering, component_id filtering, partial failure, empty results, unknown alias, client cleanup
• TestConfigServiceGetConfigDetail (4 tests): success, unknown alias, API error, client cleanup on error
• TestResolveProjects (4 tests): all projects, specific aliases, unknown alias, empty list
• TestConfigList (11 tests): JSON output, human output, project filter, multiple projects, type filter, component_id filter, unknown alias exit code 5, partial failure (JSON + human), empty results, invalid component type exit code 2
• TestConfigDetail (5 tests): JSON output, human output, unknown alias exit code 5, API error exit code, auth error exit code 3

Files Changed

• src/keboola_agent_cli/services/config_service.py (NEW)
• src/keboola_agent_cli/commands/config.py (REPLACED stubs)
• src/keboola_agent_cli/output.py (EXTENDED)
• src/keboola_agent_cli/cli.py (EXTENDED)
• tests/test_services.py (EXTENDED)
• tests/test_cli.py (EXTENDED)