feat: add structured failure telemetry

[hubgan]

Summary

• Added central FAILURE_CODES and FailureSignal helpers in @argent/registry.
• Attached structured, sanitized failure metadata across registry errors, tool-server tools/services, HTTP validation/dependency gates, installer flows, and argent run.
• Added telemetry allowlisting for safe failure fields only: static error codes/stages, coarse area/kind/command, bounded exit codes, allowlisted signals/spawn codes, and coarse network failure classes.
• Split CLI-local argent run failures into cli:run_fail so they are not double-counted as tool failures.
• Added installer telemetry for failed package actions, update/uninstall failures, rules/agents copy results, and skill refresh results.
• Made telemetry consent writes atomic and kept telemetry status side-effect free via peekAnonId().

Tests

• Added/updated tests for registry failure signals, telemetry sanitization, registry listener forwarding, CLI run failure telemetry, HTTP preflight failure telemetry, and uninstall failure telemetry.