refactor: imports and reorganize domain structure

- Updated import statements across multiple modules to use relative imports for better encapsulation.
- Consolidated and organized the `__init__.py` files in various domain packages to expose necessary classes and functions.
- Improved code readability and maintainability by grouping related imports and removing unused ones.
- Ensured consistent import patterns across the domain, enhancing the overall structure of the codebase.

domain/processors/__init__.py

@@ -0,0 +1,35 @@
+from .base import BaseProcessor
+from .registry import (
+    CONFIG_SCHEMAS,
+    TYPE_MAP,
+    get_config_schema,
+    get_config_schemas,
+    get_last_discovery_errors,
+    get_module_path,
+    reload_processors,
+)
+from .service import (
+    ProcessorService,
+    get_processor,
+    list_processors,
+    reload_processor_modules,
+)
+from .types import ProcessDirectoryRequest, ProcessRequest, UpdateSourceRequest
+
+__all__ = [
+    "BaseProcessor",
+    "CONFIG_SCHEMAS",
+    "TYPE_MAP",
+    "get_config_schema",
+    "get_config_schemas",
+    "get_last_discovery_errors",
+    "get_module_path",
+    "reload_processors",
+    "ProcessorService",
+    "get_processor",
+    "list_processors",
+    "reload_processor_modules",
+    "ProcessDirectoryRequest",
+    "ProcessRequest",
+    "UpdateSourceRequest",
+]