Launch V45 expanded corpus training loop

docs/CODEX_EXECUTION_LOG.md

@@ -11963,3 +11963,25 @@ Open:
   protected test and pure-background sets.
 - Obtain final representative human contact-sheet approval, promote the exact
   checksummed model, and redeploy from the canonical Tower directory.
+## 2026-07-29 - V44 Flemish corpus expansion and V45 training loop
+
+- Acquired twelve independent Flemish train-only AOIs covering dense coastal
+  development, ribbon development, industry, dunes, docks and pure-empty
+  agricultural background. The immutable expansion manifest SHA-256 is
+  `62fdb4adee46ff67a40636f30a22fc97b8c9bd14516cbe0a24ed0de2db56f4fb`.
+- Refined 2,391 labels with SAM2 on `cuda:0`; 124 unsafe refinements fell back
+  to their source geometry. Lossless overlap retiling retained all 2,515
+  unique source labels in 192 tiles.
+- Composed the 168-AOI V44 corpus and retained the exact V42 calibration,
+  protected-test, background-test and internal-validation assignments. The
+  rotated manifest SHA-256 is
+  `448bb3ec426a6af129f01d29732160f84b9936c9871a033de13a7d98b9d25112`.
+- Corpus evidence reports 30,113 accepted features, zero temporal-unknown
+  samples, zero spatial leakage and zero protected samples in training. The
+  YOLO dataset-quality audit passed. Automated corpus checks have no failures;
+  final human contact-sheet review remains deliberately deferred until every
+  model release gate passes.
+- Added the reproducible V45 command. It starts from the strongest V43 Flemish
+  checkpoint (`iteration-005`, SHA-256
+  `be8c5a4d27dfcd03e29e59ce78ea66d3c772c3e612c08b71fd457d3006001b71`)
+  and trains against the expanded V44 corpus on the NVIDIA server.