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/sqlalchemy/dialects/mysql/expression.py

@@ -0,0 +1,146 @@
+# dialects/mysql/expression.py
+# Copyright (C) 2005-2026 the SQLAlchemy authors and contributors
+# <see AUTHORS file>
+#
+# This module is part of SQLAlchemy and is released under
+# the MIT License: https://www.opensource.org/licenses/mit-license.php
+
+from __future__ import annotations
+
+from typing import Any
+
+from ... import exc
+from ... import util
+from ...sql import coercions
+from ...sql import elements
+from ...sql import operators
+from ...sql import roles
+from ...sql.base import _generative
+from ...sql.base import Generative
+from ...util.typing import Self
+
+
+class match(Generative, elements.BinaryExpression[Any]):
+    """Produce a ``MATCH (X, Y) AGAINST ('TEXT')`` clause.
+
+    E.g.::
+
+        from sqlalchemy import desc
+        from sqlalchemy.dialects.mysql import match
+
+        match_expr = match(
+            users_table.c.firstname,
+            users_table.c.lastname,
+            against="Firstname Lastname",
+        )
+
+        stmt = (
+            select(users_table)
+            .where(match_expr.in_boolean_mode())
+            .order_by(desc(match_expr))
+        )
+
+    Would produce SQL resembling:
+
+    .. sourcecode:: sql
+
+        SELECT id, firstname, lastname
+        FROM user
+        WHERE MATCH(firstname, lastname) AGAINST (:param_1 IN BOOLEAN MODE)
+        ORDER BY MATCH(firstname, lastname) AGAINST (:param_2) DESC
+
+    The :func:`_mysql.match` function is a standalone version of the
+    :meth:`_sql.ColumnElement.match` method available on all
+    SQL expressions, as when :meth:`_expression.ColumnElement.match` is
+    used, but allows to pass multiple columns
+
+    :param cols: column expressions to match against
+
+    :param against: expression to be compared towards
+
+    :param in_boolean_mode: boolean, set "boolean mode" to true
+
+    :param in_natural_language_mode: boolean , set "natural language" to true
+
+    :param with_query_expansion: boolean, set "query expansion" to true
+
+    .. versionadded:: 1.4.19
+
+    .. seealso::
+
+        :meth:`_expression.ColumnElement.match`
+
+    """
+
+    __visit_name__ = "mysql_match"
+
+    inherit_cache = True
+    modifiers: util.immutabledict[str, Any]
+
+    def __init__(self, *cols: elements.ColumnElement[Any], **kw: Any):
+        if not cols:
+            raise exc.ArgumentError("columns are required")
+
+        against = kw.pop("against", None)
+
+        if against is None:
+            raise exc.ArgumentError("against is required")
+        against = coercions.expect(
+            roles.ExpressionElementRole,
+            against,
+        )
+
+        left = elements.BooleanClauseList._construct_raw(
+            operators.comma_op,
+            clauses=cols,
+        )
+        left.group = False
+
+        flags = util.immutabledict(
+            {
+                "mysql_boolean_mode": kw.pop("in_boolean_mode", False),
+                "mysql_natural_language": kw.pop(
+                    "in_natural_language_mode", False
+                ),
+                "mysql_query_expansion": kw.pop("with_query_expansion", False),
+            }
+        )
+
+        if kw:
+            raise exc.ArgumentError("unknown arguments: %s" % (", ".join(kw)))
+
+        super().__init__(left, against, operators.match_op, modifiers=flags)
+
+    @_generative
+    def in_boolean_mode(self) -> Self:
+        """Apply the "IN BOOLEAN MODE" modifier to the MATCH expression.
+
+        :return: a new :class:`_mysql.match` instance with modifications
+         applied.
+        """
+
+        self.modifiers = self.modifiers.union({"mysql_boolean_mode": True})
+        return self
+
+    @_generative
+    def in_natural_language_mode(self) -> Self:
+        """Apply the "IN NATURAL LANGUAGE MODE" modifier to the MATCH
+        expression.
+
+        :return: a new :class:`_mysql.match` instance with modifications
+         applied.
+        """
+
+        self.modifiers = self.modifiers.union({"mysql_natural_language": True})
+        return self
+
+    @_generative
+    def with_query_expansion(self) -> Self:
+        """Apply the "WITH QUERY EXPANSION" modifier to the MATCH expression.
+
+        :return: a new :class:`_mysql.match` instance with modifications
+         applied.
+        """
+
+        self.modifiers = self.modifiers.union({"mysql_query_expansion": True})
+        return self