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/tkrajina/go-reflector/reflector/utils.go

@@ -0,0 +1,60 @@
+package reflector
+
+import (
+	"fmt"
+	"strconv"
+)
+
+// ParseTag parses a golang struct tag into a map.
+func ParseTag(tag string) (map[string]string, error) {
+	res := map[string]string{}
+
+	// This code is copied/modified from: reflect/type.go:
+	for tag != "" {
+		// Skip leading space.
+		i := 0
+		for i < len(tag) && tag[i] == ' ' {
+			i++
+		}
+		tag = tag[i:]
+		if tag == "" {
+			break
+		}
+
+		// Scan to colon. A space, a quote or a control character is a syntax error.
+		// Strictly speaking, control chars include the range [0x7f, 0x9f], not just
+		// [0x00, 0x1f], but in practice, we ignore the multi-byte control characters
+		// as it is simpler to inspect the tag's bytes than the tag's runes.
+		i = 0
+		for i < len(tag) && tag[i] > ' ' && tag[i] != ':' && tag[i] != '"' && tag[i] != 0x7f {
+			i++
+		}
+		if i == 0 || i+1 >= len(tag) || tag[i] != ':' || tag[i+1] != '"' {
+			break
+		}
+		name := string(tag[:i])
+		tag = tag[i+1:]
+
+		// Scan quoted string to find value.
+		i = 1
+		for i < len(tag) && tag[i] != '"' {
+			if tag[i] == '\\' {
+				i++
+			}
+			i++
+		}
+		if i >= len(tag) {
+			break
+		}
+		qvalue := string(tag[:i+1])
+		tag = tag[i+1:]
+
+		value, err := strconv.Unquote(qvalue)
+		if err != nil {
+			return nil, fmt.Errorf("Cannot unquote tag %s in %s: %s", name, tag, err.Error())
+		}
+		res[name] = value
+	}
+
+	return res, nil
+}