refactor: split precheck_core and migrate commands to commands/

- Split 900-line precheck_core.py into 9 focused modules:
  precheck_constants, time_utils, data_utils, state_manager,
  market_data, candidate_scoring, snapshot_builder,
  adaptive_profile, trigger_analyzer
- Remove dead auto_trader command and module
- Migrate 7 root-level command modules into commands/:
  check_api, doctor, external_gate, init_user_state,
  market_probe, paths, rotate_external_gate_log
- Keep thin backward-compatible facades in root package
- Update cli.py MODULE_MAP to route through commands/
- Verified compileall and smoke tests for all key commands

src/coinhunter/doctor.py

@@ -1,66 +1,8 @@
-"""Runtime diagnostics for CoinHunter CLI."""
+"""Backward-compatible facade for doctor."""
 
 from __future__ import annotations
 
-import json
-import os
-import platform
-import shutil
-import sys
-
-from .runtime import ensure_runtime_dirs, get_runtime_paths, load_env_file, resolve_hermes_executable
-
-
-REQUIRED_ENV_VARS = ["BINANCE_API_KEY", "BINANCE_API_SECRET"]
-
-
-def main() -> int:
-    paths = ensure_runtime_dirs(get_runtime_paths())
-    env_file = load_env_file(paths)
-    hermes_executable = resolve_hermes_executable(paths)
-
-    env_checks = {}
-    missing_env = []
-    for name in REQUIRED_ENV_VARS:
-        present = bool(os.getenv(name))
-        env_checks[name] = present
-        if not present:
-            missing_env.append(name)
-
-    file_checks = {
-        "env_file_exists": env_file.exists(),
-        "config_exists": paths.config_file.exists(),
-        "positions_exists": paths.positions_file.exists(),
-        "logrotate_config_exists": paths.logrotate_config.exists(),
-    }
-    dir_checks = {
-        "root_exists": paths.root.exists(),
-        "state_dir_exists": paths.state_dir.exists(),
-        "logs_dir_exists": paths.logs_dir.exists(),
-        "reviews_dir_exists": paths.reviews_dir.exists(),
-        "cache_dir_exists": paths.cache_dir.exists(),
-    }
-    command_checks = {
-        "hermes": bool(shutil.which("hermes") or paths.hermes_bin.exists()),
-        "logrotate": bool(shutil.which("logrotate") or shutil.which("/usr/sbin/logrotate")),
-    }
-
-    report = {
-        "ok": not missing_env,
-        "python": sys.version.split()[0],
-        "platform": platform.platform(),
-        "env_file": str(env_file),
-        "hermes_executable": hermes_executable,
-        "paths": paths.as_dict(),
-        "env_checks": env_checks,
-        "missing_env": missing_env,
-        "file_checks": file_checks,
-        "dir_checks": dir_checks,
-        "command_checks": command_checks,
-    }
-    print(json.dumps(report, ensure_ascii=False, indent=2))
-    return 0 if report["ok"] else 1
-
+from .commands.doctor import main
 
 if __name__ == "__main__":
     raise SystemExit(main())