Deep-dive survey of one module. Spawns the dep-grapher, api-surface-extractor, wire-api-extractor, test-auditor, and ops-detective subagents in parallel, then assembles the module's CODEBASE.md from their reports. Idempotent — re-running rewrites the file. Trigger after /codebase-survey-init has produced module stubs, or whenever a single module needs a fresh detailed survey. Argument: the module path (relative to repo root).
