Update NetVLAD checkpoint paths and enhance .gitignore

- Changed paths in documentation and configuration files to reflect the new naming convention for the NetVLAD model, transitioning from `models/netvlad/netvlad.pt` to `models/net_vlad/net_vlad.pt`.
- Updated the `.gitignore` to include additional file types and directories related to input data and locally-generated evidence frames.
- Removed the old NetVLAD checkpoint file as part of the transition to the new naming scheme.

These changes ensure consistency across the project and improve the management of generated files.

_docs/03_ip_attribution/netvlad.md

@@ -1,6 +1,7 @@
 # NetVLAD-VGG16 Checkpoint — Provenance & License
 
-**Artifact**: `models/netvlad/netvlad.pt`
+**Artifact**: `models/net_vlad/net_vlad.pt`
+**Note**: File stem MUST equal `c2_vpr.net_vlad.MODEL_NAME == "net_vlad"` — the PyTorch FP16 runtime uses `path.stem` as the architecture-registry lookup key.
 **Generated**: 2026-05-29 (AZ-965)
 **Architecture**: project-owned `_NetVladVgg16` in `src/gps_denied_onboard/components/c2_vpr/_net_vlad_architecture.py`
 **Parameters**: 149,002,112 (~568.4 MiB fp32)
@@ -44,7 +45,7 @@ export SSL_CERT_FILE=$(python -c "import certifi; print(certifi.where())")
 
 # Generate the checkpoint:
 python scripts/mk_netvlad_checkpoint.py
-# → writes models/netvlad/netvlad.pt
+# → writes models/net_vlad/net_vlad.pt
 ```
 
 The script is **deterministic** (`torch.manual_seed(0)` before the random-init layers, IMAGENET1K_V1 weights are content-addressed). Re-running on a different machine yields the same SHA-256.