refactor(settings): unify config.py, mconfig.py, and settings.py into single PrySettings

- Merge all configuration into settings.py with PRY_* env var prefix.
- Add legacy env aliases (PROXY_URL, TOR_ENABLED, MAX_RETRIES, etc.) for migration.
- Load and persist runtime overrides from JSON config file (default /app/config.json).
- Update scraper.py, deps.py, routers/config.py to use unified settings.
- Add resolved_proxy_chain and resolved_proxy_url properties.
- Replace tests/test_mconfig.py with tests/test_settings.py (9 tests).
- Update .env.example with new PRY_* options.
- All 500 tests pass; ruff clean.

tests/test_mconfig.py

@@ -1,47 +0,0 @@
-# SPDX-License-Identifier: MIT
-# Copyright (c) 2026 Rug Munch Media LLC
-#
-# Part of Pry — https://git.rugmunch.io/RugMunchMedia/pryscraper
-# Licensed under MIT. See LICENSE.
-"""Tests for Pry config."""
-
-from mconfig import PryConfig
-
-
-def test_config_get_default() -> None:
-    c = PryConfig()
-    assert c.get("nonexistent.key", "fallback") == "fallback"
-
-
-def test_config_get_retry_exists() -> None:
-    c = PryConfig()
-    val = c.get("retry.max_attempts")
-    assert isinstance(val, int)
-    assert val > 0
-
-
-def test_config_get_rate_limit_exists() -> None:
-    c = PryConfig()
-    val = c.get("rate_limit.rpm")
-    assert isinstance(val, int)
-    assert val > 0
-
-
-def test_config_to_dict_excludes_private() -> None:
-    c = PryConfig()
-    d = c.to_dict()
-    assert "_proxy_chain" not in d
-    assert "_proxy_url" not in d
-
-
-def test_config_update_returns_ok() -> None:
-    c = PryConfig()
-    result = c.update({"retry": {"max_attempts": 5}})
-    assert result["status"] == "ok"
-    assert c.get("retry.max_attempts") == 5
-
-
-def test_config_get_proxy_url_string_or_none() -> None:
-    c = PryConfig()
-    url = c.get_proxy_url()
-    assert url is None or isinstance(url, str)

tests/test_settings.py

@@ -0,0 +1,93 @@
+# SPDX-License-Identifier: MIT
+# Copyright (c) 2026 Rug Munch Media LLC
+#
+# Part of Pry — https://git.rugmunch.io/RugMunchMedia/pryscraper
+# Licensed under MIT. See LICENSE.
+"""Tests for unified Pry settings."""
+
+import json
+from pathlib import Path
+
+import pytest
+
+from settings import _NESTED_KEY_MAP, PrySettings
+
+
+@pytest.fixture
+def isolated_settings(tmp_path: Path) -> PrySettings:
+    """Return a fresh settings instance with a temp config file."""
+    config_file = tmp_path / "config.json"
+    return PrySettings(config_file=config_file)
+
+
+def test_settings_get_default(isolated_settings: PrySettings) -> None:
+    assert isolated_settings.max_retries == 3
+    assert isolated_settings.rate_limit_rpm == 120
+
+
+def test_settings_proxy_resolution(isolated_settings: PrySettings) -> None:
+    assert isolated_settings.resolved_proxy_url is None
+    isolated_settings.proxy_enabled = True
+    isolated_settings.proxy_url = "http://proxy.example:8080"
+    assert isolated_settings.resolved_proxy_url == "http://proxy.example:8080"
+
+
+def test_settings_tor_chain(isolated_settings: PrySettings) -> None:
+    isolated_settings.tor_enabled = True
+    isolated_settings.proxy_enabled = True
+    isolated_settings.proxy_url = "http://proxy.example:8080"
+    chain = isolated_settings.resolved_proxy_chain
+    assert len(chain) == 2
+    assert chain[0].startswith("socks5://")
+
+
+def test_settings_to_api_dict_excludes_private(isolated_settings: PrySettings) -> None:
+    data = isolated_settings.to_api_dict()
+    assert "_proxy_chain" not in data
+    assert "proxy" in data
+    assert isinstance(data["proxy"]["enabled"], bool)
+
+
+def test_settings_update_and_persist(isolated_settings: PrySettings) -> None:
+    result = isolated_settings.update({"retry": {"max_attempts": 5}})
+    assert result["status"] == "ok"
+    assert isolated_settings.max_retries == 5
+    assert isolated_settings.config_file.exists()
+    saved = json.loads(isolated_settings.config_file.read_text(encoding="utf-8"))
+    assert saved["retry"]["max_attempts"] == 5
+
+
+def test_settings_load_config_file(tmp_path: Path) -> None:
+    config_file = tmp_path / "config.json"
+    config_file.write_text(
+        json.dumps({"retry": {"max_attempts": 7}, "tor": {"enabled": True}}),
+        encoding="utf-8",
+    )
+    s = PrySettings(config_file=config_file)
+    assert s.max_retries == 7
+    assert s.tor_enabled is True
+
+
+def test_settings_legacy_env_vars(monkeypatch: pytest.MonkeyPatch, tmp_path: Path) -> None:
+    monkeypatch.setenv("PROXY_URL", "http://legacy-proxy:8080")
+    monkeypatch.setenv("TOR_ENABLED", "true")
+    monkeypatch.setenv("MAX_RETRIES", "9")
+    config_file = tmp_path / "config.json"
+    s = PrySettings(config_file=config_file)
+    assert s.proxy_url == "http://legacy-proxy:8080"
+    assert s.tor_enabled is True
+    assert s.max_retries == 9
+
+
+def test_settings_enable_tor(isolated_settings: PrySettings) -> None:
+    result = isolated_settings.enable_tor()
+    assert result["status"] == "ok"
+    assert isolated_settings.tor_enabled is True
+    assert isolated_settings.proxy_enabled is True
+    assert isolated_settings.proxy_url == "socks5://tor:9050"
+
+
+def test_nested_key_map_complete() -> None:
+    """Ensure every API-facing nested key maps to a settings attribute."""
+    for attr in _NESTED_KEY_MAP.values():
+        assert attr in PrySettings.model_fields, f"PrySettings missing {attr}"