fix(cli,sentry): fix --org/--server flags and add Sentry capture to backend errors

[zbigniewsobiecki]

Summary

• Fix --org and --server CLI flags: These flags on all 40+ dashboard CLI commands were silently ignored because parseBaseFlags() in the DashboardCommand base class was a stub that always returned undefined. Added an extractBaseFlags() pure function that parses flag values directly from this.argv — zero changes to any subcommand.
• Add missing Sentry capture to backend adapter: The claude-code backend adapter's catch block logged errors locally but never called captureException(), unlike the llmist backend lifecycle which had the correct pattern. Backend execution failures (e.g. 404 on PR fetch due to missing repo access) were invisible to Sentry monitoring.

Files changed

File	Change
src/cli/dashboard/_shared/base.ts	Add extractBaseFlags() helper, wire into parseBaseFlags()
src/backends/adapter.ts	Add captureException() call in catch block
tests/unit/cli/dashboard/base.test.ts	12 new tests (9 unit + 3 integration)
tests/unit/cli/dashboard/client.test.ts	1 new test for x-org-context header
tests/unit/backends/adapter.test.ts	1 new test verifying Sentry capture on backend error

Test plan

• extractBaseFlags unit tests: empty argv, --org, --server, both, = syntax, missing value, -- stop, mixed flags
• Integration tests: TestCommand with --org/--server argv passes overrides to createDashboardClient
• x-org-context header set when orgId present in config
• captureException called with correct tags/extra when backend throws
• Full test suite: 2739 tests passing
• Lint + typecheck clean

🤖 Generated with Claude Code