When dryRun=true, each function logs its parameters and returns a stub
result without executing any subprocess or network call. Log output is
captured by log-store for analysis.
- spawnSafe: returns { exitCode: 0, stdout: '[dryRun] skipped' }
- cursorAgent: short-circuits before spawnSafe, returns ok('[dryRun] skipped')
- llmExtract: skips fetch, returns ok({} as T)
- Tests added for spawnSafe and llmExtract dryRun paths
Fixes#104
xiaoju