feat: ж/д слой + cant_swim в скоринг + профили вне модели

Определение специфических рекомендаций (матрица профилей §8):

1. Ж/д слой (закрыт мёртвый railway ×2.5 у РАС):
   - /api/v1/water/{case_id} отдаёт railway=rail как LineString
     (без service/industrial/military веток), кэш общий v2;
   - railway_warning «перекрыть/проверить немедленно» по профилям;
   - SearchMap: Polyline слой ж/д (тёмно-красный), счётчики 💧/🚂.

2. cant_swim → профиль не_умеет_плавать (water ×3.0, без изменения
   радиуса, critical_warning «обследовать водоёмы НЕМЕДЛЕННО»):
   - раньше чекбокс влиял только на текст, в скоринге был пробел;
   - derive в analyze._derive_profiles — работает и для closed_cases.

3. unmodeled_profiles: ДЦП/слабое зрение/слух — честная пометка
   «вне поведенческой модели» с пояснением (vector_tasks B12:
   профили без аналога не выдавать за учтённые); блок на фронте
   в карточке здоровья.

Площадь воды: сферический эксцесс, проверен на квадрате 53° (744017 м²
vs 743272 точного). Тесты: 202 passed (новый test_cant_swim_profile).

.venv-test/lib/python3.12/site-packages/starlette/config.py

@@ -0,0 +1,140 @@
+from __future__ import annotations
+
+import os
+import warnings
+from collections.abc import Callable, Iterator, Mapping, MutableMapping
+from pathlib import Path
+from typing import Any, TypeVar, overload
+
+
+class undefined:
+    pass
+
+
+class EnvironError(Exception):
+    pass
+
+
+class Environ(MutableMapping[str, str]):
+    def __init__(self, environ: MutableMapping[str, str] = os.environ):
+        self._environ = environ
+        self._has_been_read: set[str] = set()
+
+    def __getitem__(self, key: str) -> str:
+        self._has_been_read.add(key)
+        return self._environ.__getitem__(key)
+
+    def __setitem__(self, key: str, value: str) -> None:
+        if key in self._has_been_read:
+            raise EnvironError(f"Attempting to set environ['{key}'], but the value has already been read.")
+        self._environ.__setitem__(key, value)
+
+    def __delitem__(self, key: str) -> None:
+        if key in self._has_been_read:
+            raise EnvironError(f"Attempting to delete environ['{key}'], but the value has already been read.")
+        self._environ.__delitem__(key)
+
+    def __iter__(self) -> Iterator[str]:
+        return iter(self._environ)
+
+    def __len__(self) -> int:
+        return len(self._environ)
+
+
+environ = Environ()
+
+T = TypeVar("T")
+
+
+class Config:
+    def __init__(
+        self,
+        env_file: str | Path | None = None,
+        environ: Mapping[str, str] = environ,
+        env_prefix: str = "",
+        encoding: str = "utf-8",
+    ) -> None:
+        self.environ = environ
+        self.env_prefix = env_prefix
+        self.file_values: dict[str, str] = {}
+        if env_file is not None:
+            if not os.path.isfile(env_file):
+                warnings.warn(f"Config file '{env_file}' not found.")
+            else:
+                self.file_values = self._read_file(env_file, encoding)
+
+    @overload
+    def __call__(self, key: str, *, default: None) -> str | None: ...
+
+    @overload
+    def __call__(self, key: str, cast: type[T], default: T = ...) -> T: ...
+
+    @overload
+    def __call__(self, key: str, cast: type[str] = ..., default: str = ...) -> str: ...
+
+    @overload
+    def __call__(
+        self,
+        key: str,
+        cast: Callable[[Any], T] = ...,
+        default: Any = ...,
+    ) -> T: ...
+
+    @overload
+    def __call__(self, key: str, cast: type[str] = ..., default: T = ...) -> T | str: ...
+
+    def __call__(
+        self,
+        key: str,
+        cast: Callable[[Any], Any] | None = None,
+        default: Any = undefined,
+    ) -> Any:
+        return self.get(key, cast, default)
+
+    def get(
+        self,
+        key: str,
+        cast: Callable[[Any], Any] | None = None,
+        default: Any = undefined,
+    ) -> Any:
+        key = self.env_prefix + key
+        if key in self.environ:
+            value = self.environ[key]
+            return self._perform_cast(key, value, cast)
+        if key in self.file_values:
+            value = self.file_values[key]
+            return self._perform_cast(key, value, cast)
+        if default is not undefined:
+            return self._perform_cast(key, default, cast)
+        raise KeyError(f"Config '{key}' is missing, and has no default.")
+
+    def _read_file(self, file_name: str | Path, encoding: str) -> dict[str, str]:
+        file_values: dict[str, str] = {}
+        with open(file_name, encoding=encoding) as input_file:
+            for line in input_file.readlines():
+                line = line.strip()
+                if "=" in line and not line.startswith("#"):
+                    key, value = line.split("=", 1)
+                    key = key.strip()
+                    value = value.strip().strip("\"'")
+                    file_values[key] = value
+        return file_values
+
+    def _perform_cast(
+        self,
+        key: str,
+        value: Any,
+        cast: Callable[[Any], Any] | None = None,
+    ) -> Any:
+        if cast is None or value is None:
+            return value
+        elif cast is bool and isinstance(value, str):
+            mapping = {"true": True, "1": True, "false": False, "0": False}
+            value = value.lower()
+            if value not in mapping:
+                raise ValueError(f"Config '{key}' has value '{value}'. Not a valid bool.")
+            return mapping[value]
+        try:
+            return cast(value)
+        except (TypeError, ValueError):
+            raise ValueError(f"Config '{key}' has value '{value}'. Not a valid {cast.__name__}.")