fix(ci): restore vector-search feature to Windows MSVC release build (#102)

The Windows x86_64-pc-windows-msvc release binary was built with
`--no-default-features --features embeddings,ort-download`, dropping
`vector-search` (the usearch HNSW index). Without that feature the
storage layer's `#[cfg(feature = "vector-search")]` paths compile out,
so embeddings are never persisted or queried. On Windows the binary
reports "Embedding Service: Not Ready", 0% coverage, `consolidate`
generates 0 embeddings, and no model download is ever attempted. The
same machine and model cache work on v2.1.23, which predates the flag.

`vector-search` was likely dropped to sidestep the usearch MSVC build
failure (C1021 from a bare-fp16 `#warning`), but that was already fixed
properly by pinning usearch with `features=["fp16lib"]`, so omitting
the feature is both unnecessary and the cause of the regression.

Verified locally: building vestige-mcp with
`embeddings,ort-download,vector-search` compiles and links cleanly, and
the reporter's repro (ingest -> consolidate -> stats) downloads the
nomic model and reaches 100% embedding coverage.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.github/workflows/release.yml

@@ -31,7 +31,14 @@ jobs:
           - target: x86_64-pc-windows-msvc
             os: windows-latest
             archive: zip
-            cargo_flags: "--no-default-features --features embeddings,ort-download"
+            # vector-search (usearch HNSW index) is REQUIRED. Without it the
+            # storage layer's #[cfg(feature = "vector-search")] paths compile
+            # out, so embeddings are never persisted or queried: the binary
+            # reports "Embedding Service: Not Ready", 0% coverage, consolidate
+            # generates 0 embeddings, and no model download is ever attempted.
+            # usearch builds cleanly on MSVC because vestige-core pins it with
+            # features=["fp16lib"] (see crates/vestige-core/Cargo.toml).
+            cargo_flags: "--no-default-features --features embeddings,ort-download,vector-search"
             needs_onnxruntime: false
           # Intel Mac uses the ort-dynamic feature to runtime-link against a
           # system libonnxruntime (Homebrew), sidestepping the missing