Restore global fiber workflows and native GPU/chunk tracing

.gitignore

@@ -1,4 +1,8 @@
 # Python venvs, IDE files, build artifacts
+/local/
+/task.md
+/experiments/
+/global-fiber-sgd
 **/.venv*/
 **/.idea/*
 **/__pycache__/

vesuvius/docs/examples/fiber_layout_benchmark.json

@@ -0,0 +1,29 @@
+{
+  "version": 1,
+  "protocol": "frozen-gt-map-half-up-v1",
+  "reference_root": "data/frozen_gt/uv_whole",
+  "arms": {
+    "free": {
+      "solver_config": "data/free/solve_config.json",
+      "events": "data/free/gt_events.json",
+      "historical_solve": "data/free/solve",
+      "expected_report": "data/free/search_report.json"
+    },
+    "joint": {
+      "solver_config": "data/joint/solve_config.json",
+      "events": "data/prepared/gt_events.json",
+      "historical_solve": "data/joint/solve",
+      "expected_report": "data/joint/search_report.json",
+      "gt_source_ids": [101, 102],
+      "force_gt_enabled": true
+    },
+    "selectable": {
+      "solver_config": "data/selectable/solve_config.json",
+      "events": "data/prepared/gt_events.json",
+      "historical_solve": "data/selectable/solve",
+      "expected_report": "data/selectable/search_report.json",
+      "gt_source_ids": [101, 102],
+      "force_gt_enabled": false
+    }
+  }
+}

vesuvius/docs/examples/fiber_layout_runtime.json

@@ -0,0 +1,11 @@
+{
+  "output_root": "results/replay_v1",
+  "devices": {"free": "0", "joint": "1", "selectable": "2"},
+  "scoring_threads": 4,
+  "gpu_manager": {
+    "exclusive": false,
+    "cpu_cores": 4,
+    "priority": 100,
+    "vram_bytes_per_gpu": 21474836480
+  }
+}

vesuvius/docs/examples/fiber_workflows/gt_width_regression.json

@@ -0,0 +1,19 @@
+{
+  "fiber_gt_convergence_probe": {
+    "source": "/data/fiber-layout/gt-initialization",
+    "reference": "/data/fiber-layout/gt-winding-reference.json",
+    "output_root": "/data/fiber-layout/results/gt-width-regression",
+    "devices": "0",
+    "gpu_manager": {
+      "exclusive": false,
+      "cpu_cores": 4,
+      "vram_bytes_per_gpu": 4294967296,
+      "label": "gt-regression"
+    },
+    "trials": [
+      {"name": "full", "checkpoint": "/data/fiber-layout/gt-initialization/solution.npz", "optimize": "joint", "steps": 3000},
+      {"name": "width_half", "checkpoint": "/data/fiber-layout/gt-initialization/solution.npz", "initial_width_scale": 0.5, "optimize": "joint", "steps": 3000},
+      {"name": "width_double", "checkpoint": "/data/fiber-layout/gt-initialization/solution.npz", "initial_width_scale": 2.0, "optimize": "joint", "steps": 3000}
+    ]
+  }
+}

vesuvius/docs/examples/fiber_workflows/joint_gt.json

@@ -0,0 +1,10 @@
+{
+  "fiber_joint_gt_eval": {
+    "baseline_root": "/data/fiber-layout/prepared",
+    "base_config": "/configs/fiber-layout/base.json",
+    "gt_root": "/data/fiber-layout/gt",
+    "output_root": "/data/fiber-layout/results/joint",
+    "force_gt_enabled": true,
+    "devices": "1"
+  }
+}

vesuvius/docs/examples/fiber_workflows/neighbors.json

@@ -0,0 +1,14 @@
+{
+  "fiber_neighbor_expansion": {
+    "seed_solve": "/data/fiber-layout/results/joint/solve",
+    "parent_tensors": "/data/fiber-layout/whole-sources/tensors.npz",
+    "afv": "/data/fiber-layout/sources.afv",
+    "gt_root": "/data/fiber-layout/gt",
+    "z_range": [30000, 50000],
+    "extract_template": "/configs/fiber-layout/extract.json",
+    "orient_template": "/configs/fiber-layout/orient.json",
+    "output_root": "/data/fiber-layout/expanded",
+    "confidence": 0.5,
+    "devices": "0"
+  }
+}