refactor(compressors): consolidate pipeline and improve mask handling

mini-nav/utils/model.py

@@ -1,6 +1,6 @@
 """Model loading utilities for DINO, SAM2 and HashCompressor."""
 
-from compressors import HashCompressor
+from typing import TYPE_CHECKING
 
 
 import torch
@@ -8,6 +8,9 @@ from transformers import AutoImageProcessor, AutoModel, pipeline, MaskGeneration
 
 from .common import get_device
 
+if TYPE_CHECKING:
+    from compressors.hash_compressor import HashCompressor
+
 
 def load_sam_model(
     model_name: str = "facebook/sam2.1-hiera-large",
@@ -44,7 +47,7 @@ def load_hash_compressor(
     input_dim: int = 1024,
     hash_bits: int = 512,
     compressor_path: str | None = None,
-) -> HashCompressor:
+) -> "HashCompressor":
     from compressors.hash_compressor import HashCompressor
 
     device = get_device()