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Oleksandr Bezdieniezhnykh
87909cce9f
Three new VprStrategy implementations for IT-12 comparative-study
(research binary only, gated OFF for airborne / operator-tooling per
ADR-002). All run via the C7 TensorRT runtime (or ONNX-RT fallback)
with their own concrete BackbonePreprocessor, single-stage L2
normalisation, and FaissBridge-delegated retrieval — same pattern as
AZ-339 (MegaLoc + MixVPR), parametrised in tests for compactness.
* SelaVprStrategy — D=512, input 224x224
* EigenPlacesStrategy — D=2048, input 480x480
* SaladStrategy — D=8448, input 322x322 (DINOv2-Large backbone;
heaviest in the C2 family — NFR-perf budget
relaxed to 120 ms p95 / 1200 MB GPU per task
spec)
The composition-root factory tables and KNOWN_STRATEGIES set were
already pre-wired at AZ-336 land time; module-layout.md already names
all three Internal entries and BUILD_VPR_* rows. No CMake change
required (env-flag gating).
54 unit tests (3 strategies * 18 cases) cover AC-1..AC-11 plus extras
(single-stage L2, NCHW FP16, constructor validation, FDR emission).
All pass; sibling c2_vpr suite + composition-root regression + AZ-526
iso-ts regression all green.
Code review verdict: PASS_WITH_WARNINGS. Two Low findings logged in
batch_51_review.md: F1 escalates `_assert_engine_output_dim`
duplication from 4-way to 7-way (already tracked by AZ-527 hygiene
PBI; will surface in cumulative review batches 49-51); F2 mirrors the
AZ-337 / 338 / 339 AC-10 spec-drift precedent (literal
ConfigurationError vs implemented ConfigError / StrategyNotAvailable).
Co-authored-by: Cursor <cursoragent@cursor.com>