refactor(server): adopt uv and modular typed FastAPI structure

.pre-commit-config.yaml

@@ -0,0 +1,25 @@
+minimum_pre_commit_version: "4.4.0"
+default_install_hook_types: [pre-commit]
+default_stages: [pre-commit]
+
+repos:
+  - repo: local
+    hooks:
+      - id: ruff-check
+        name: Ruff lint
+        entry: uv run --locked ruff check --force-exclude
+        language: unsupported
+        types_or: [python, pyi]
+        require_serial: true
+      - id: ruff-format
+        name: Ruff formatting
+        entry: uv run --locked ruff format --check --force-exclude
+        language: unsupported
+        types_or: [python, pyi]
+        require_serial: true
+      - id: mypy
+        name: Python types
+        entry: uv run --locked mypy
+        language: unsupported
+        pass_filenames: false
+        files: ^(s2s_client/|s2s-client/server\.py|pyproject\.toml|uv\.lock)