Add runtime telemetry evidence seed

[hyeokjun32]

Summary

• add additive runtime_telemetry evidence block to Runtime result JSON
• record runtime_telemetry_recorded lifecycle event for downstream history/replay ingestion
• validate telemetry schema in Runtime contract tests and smoke
• document Runtime Intelligence boundary in README

Tests

• cmake -S . -B build
• cmake --build build
• python3 tests/test_lab_result_schema.py
• python3 tests/test_agent_runtime_result_contract.py
• bash scripts/smoke_default.sh
• python3 -m unittest discover -s tests -p 'test_*.py'

Note: python3 -m pytest tests -q -p no:cacheprovider could not run because pytest is not installed in this Runtime repo environment; unittest/smoke coverage was used instead.