Switch remote deploy to vendored source builds

Move remote deployment to a vendored source bundle built on the target host via Docker so redeploys no longer require local cross-compilation or host Go installation.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

vendor/github.com/jchv/go-winloader/internal/loader/loader.go

@@ -0,0 +1,25 @@
+package loader
+
+// Module represents a loaded Windows module.
+type Module interface {
+	// Proc returns a procedure by symbol name. Returns nil if the symbol is
+	// not found.
+	Proc(name string) Proc
+
+	// Ordinal returns a procedure by ordinal.
+	Ordinal(ordinal uint64) Proc
+
+	// Free closes the module and frees the memory. After this, GetProcAddress
+	// will stop working and procedures will no longer function.
+	Free() error
+}
+
+// Loader represents a named module loader implementation.
+type Loader interface {
+	Load(libname string) (Module, error)
+}
+
+// MemLoader represents a memory module loader implementation.
+type MemLoader interface {
+	LoadMem(module []byte) (Module, error)
+}