refactor: address high-priority debt and publish to PyPI

- Fix TOCTOU race conditions by wrapping read-modify-write cycles
  under single-file locks in execution_state, portfolio_service,
  precheck_state, state_manager, and precheck_service.
- Add missing test coverage (96 tests total):
  - test_review_service.py (15 tests)
  - test_check_api.py (6 tests)
  - test_external_gate.py main branches (+10 tests)
  - test_trade_execution.py new commands (+8 tests)
- Unify all agent-consumed JSON messages to English.
- Config-ize hardcoded values (volume filter, schema_version) via
  get_user_config with sensible defaults.
- Add 1-hour TTL to exchange cache with force_new override.
- Add ruff and mypy to dev dependencies; fix all type errors.
- Add __all__ declarations to 11 service modules.
- Sync README with new commands, config tuning docs, and PyPI badge.
- Publish package as coinhunter==1.0.0 on PyPI with MIT license.
- Deprecate coinhunter-cli==1.0.1 with runtime warning.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/test_cli.py

@@ -0,0 +1,58 @@
+"""Tests for CLI routing and parser behavior."""
+
+import pytest
+
+from coinhunter.cli import ALIASES, MODULE_MAP, build_parser, run_python_module
+
+
+class TestAliases:
+    def test_all_aliases_resolve_to_canonical(self):
+        for alias, canonical in ALIASES.items():
+            assert canonical in MODULE_MAP, f"alias {alias!r} points to missing canonical {canonical!r}"
+
+    def test_no_alias_is_itself_an_alias_loop(self):
+        for alias in ALIASES:
+            assert alias not in ALIASES.values() or alias in MODULE_MAP
+
+
+class TestModuleMap:
+    def test_all_modules_exist(self):
+        import importlib
+
+        for command, module_name in MODULE_MAP.items():
+            full = f"coinhunter.{module_name}"
+            mod = importlib.import_module(full)
+            assert hasattr(mod, "main"), f"{full} missing main()"
+
+
+class TestBuildParser:
+    def test_help_includes_commands(self):
+        parser = build_parser()
+        help_text = parser.format_help()
+        assert "coinhunter diag" in help_text
+        assert "coinhunter exec" in help_text
+
+    def test_parses_command_and_args(self):
+        parser = build_parser()
+        ns = parser.parse_args(["exec", "bal"])
+        assert ns.command == "exec"
+        assert "bal" in ns.args
+
+    def test_version_action_exits(self):
+        parser = build_parser()
+        with pytest.raises(SystemExit) as exc:
+            parser.parse_args(["--version"])
+        assert exc.value.code == 0
+
+
+class TestRunPythonModule:
+    def test_runs_module_main_and_returns_int(self):
+        result = run_python_module("commands.paths", [], "coinhunter paths")
+        assert result == 0
+
+    def test_mutates_sys_argv(self):
+        import sys
+
+        original = sys.argv[:]
+        run_python_module("commands.paths", ["--help"], "coinhunter paths")
+        assert sys.argv == original