Refactor import statements for ResponseBase in API routers

- Updated import statements in the following files to import ResponseBase directly from models instead of models.response:
  - routers/api/v1/share/__init__.py
  - routers/api/v1/site/__init__.py
  - routers/api/v1/slave/__init__.py
  - routers/api/v1/tag/__init__.py
  - routers/api/v1/user/__init__.py
  - routers/api/v1/vas/__init__.py
  - routers/api/v1/webdav/__init__.py

Enhance user registration and related endpoints in user router

- Changed return type annotations from models.response.ResponseBase to models.ResponseBase in multiple functions.
- Updated return statements to reflect the new import structure.
- Improved documentation for clarity.

Add PhysicalFile model and storage service implementation

- Introduced PhysicalFile model to represent actual files on disk with reference counting logic.
- Created storage service module with local storage implementation, including file operations and error handling.
- Defined exceptions for storage operations to improve error handling.
- Implemented naming rule parser for generating file and directory names based on templates.

Update dependency management in uv.lock

- Added aiofiles version 25.1.0 to the project dependencies.

uv.lock

@@ -6,6 +6,15 @@ resolution-markers = [
     "python_full_version < '3.14'",
 ]
 
+[[package]]
+name = "aiofiles"
+version = "25.1.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/41/c3/534eac40372d8ee36ef40df62ec129bee4fdb5ad9706e58a29be53b2c970/aiofiles-25.1.0.tar.gz", hash = "sha256:a8d728f0a29de45dc521f18f07297428d56992a742f0cd2701ba86e44d23d5b2", size = 46354, upload-time = "2025-10-09T20:51:04.358Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/bc/8a/340a1555ae33d7354dbca4faa54948d76d89a27ceef032c8c3bc661d003e/aiofiles-25.1.0-py3-none-any.whl", hash = "sha256:abe311e527c862958650f9438e859c1fa7568a141b22abcd015e120e86a85695", size = 14668, upload-time = "2025-10-09T20:51:03.174Z" },
+]
+
 [[package]]
 name = "aiohappyeyeballs"
 version = "2.6.1"
@@ -421,6 +430,7 @@ name = "disknext-server"
 version = "0.0.1"
 source = { virtual = "." }
 dependencies = [
+    { name = "aiofiles" },
     { name = "aiohttp" },
     { name = "aiosqlite" },
     { name = "argon2-cffi" },
@@ -444,6 +454,7 @@ dependencies = [
 
 [package.metadata]
 requires-dist = [
+    { name = "aiofiles", specifier = ">=25.1.0" },
     { name = "aiohttp", specifier = ">=3.13.2" },
     { name = "aiosqlite", specifier = ">=0.21.0" },
     { name = "argon2-cffi", specifier = ">=25.1.0" },