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/vmem/common.go

@@ -0,0 +1,55 @@
+package vmem
+
+const (
+	memDecommit = 0x4000
+	memRelease  = 0x8000
+)
+
+type systemInfo struct {
+	wProcessorArchitecture      uint16
+	wReserved                   uint16
+	dwPageSize                  uint32
+	lpMinimumApplicationAddress uintptr
+	lpMaximumApplicationAddress uintptr
+	dwActiveProcessorMask       uintptr
+	dwNumberOfProcessors        uint32
+	dwProcessorType             uint32
+	dwAllocationGranularity     uint32
+	wProcessorLevel             uint16
+	wProcessorRevision          uint16
+}
+
+// Enumeration of allocation type values.
+const (
+	MemCommit    = 0x00001000
+	MemReserve   = 0x00002000
+	MemReset     = 0x00080000
+	MemResetUndo = 0x10000000
+)
+
+// Enumeration of protection levels.
+const (
+	PageNoAccess         = 0x01
+	PageReadOnly         = 0x02
+	PageReadWrite        = 0x04
+	PageWriteCopy        = 0x08
+	PageExecute          = 0x10
+	PageExecuteRead      = 0x20
+	PageExecuteReadWrite = 0x40
+	PageExecuteWriteCopy = 0x80
+)
+
+// RoundDown rounds an address up to a given multiple of size. Size must be a
+// power of two.
+func RoundDown(addr uint64, size uint64) uint64 {
+	if size&(size-1) != 0 {
+		panic("alignment size is not a power of two")
+	}
+	return addr &^ (size - 1)
+}
+
+// RoundUp rounds an address up to a given multiple of size. Size must be a
+// power of two.
+func RoundUp(addr uint64, size uint64) uint64 {
+	return RoundDown(addr+size-1, size)
+}