Bump sqlalchemy from 2.0.52 to 2.1.1 in /backend/app

[dependabot]

Bumps sqlalchemy from 2.0.52 to 2.1.1.

Release notes

Sourced from sqlalchemy's releases.

2.1.1

Released: September 25, 2026

platform

• [platform] [bug] Removed the legacy underscore-separated extra names such as mssql_pymssql and postgresql_psycopg from pyproject.toml. They normalize to the same names as the existing dash-separated extras, which is disallowed by PEP 685, and caused the 2.1.0 source distribution to fail to build with installers that enforce this rule, such as uv. The underscore spellings continue to work when installing, as installers normalize extra names before matching them.

  References: #13604

2.1.0

Released: September 24, 2026

orm

• [orm] [feature] Added _orm.composite.column_template parameter to _orm.composite(). When the composite class is a dataclass, this parameter accepts a string template such as "person_%s", containing exactly one %s placeholder, that's used to generate column names for dataclass fields that don't otherwise have an explicit name, rather than using the bare field name. This removes the need to hand-write a _orm.mapped_column() for each field when the same composite dataclass is mapped multiple times on the same class with different column-name prefixes. Pull request courtesy Leonardo Rosa.

  References: #12575

• [orm] [bug] Fixed issue where pickling an ORM object that had an instance level lazy loader established, such as when the _orm.raiseload() option is used, would emit a spurious warning regarding the loader containing additional criteria, if the object had itself been unpickled from a previous serialization. This would occur for objects that cross more than one serialization boundary, such as when using multiprocessing.

  This change is also backported to: 2.0.53

  References: #13574

• [orm] [bug] Fixed issue where calling _orm.aliased() against an existing _orm.aliased() construct, without passing an explicit selectable, would disregard the selectable of the existing construct and produce an

... (truncated)

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[dependabot]

Superseded by #129.