feat: add field comments, local time zone decoding and in-value cancellation

Assisted-by: GLM 5.3 Flash

parser.go

@@ -1079,7 +1079,15 @@ func (p *parser) parseArray() (val any, err error) {
 			}
 		}()
 	}
-	for {
+	for i := 0; ; i++ {
+		// A container the size of memory should answer cancellation inside the
+		// value, not only between statements, so the element loops check the
+		// context on their own cadence.
+		if i%ctxCheckInterval == 0 {
+			if err := p.checkCtx(); err != nil {
+				return nil, err
+			}
+		}
 		if err := p.skipNestedSpace(); err != nil {
 			return nil, err
 		}
@@ -1148,7 +1156,12 @@ func (p *parser) parseInlineTable() (val any, err error) {
 		p.pos++
 		return tbl, nil
 	}
-	for {
+	for i := 0; ; i++ {
+		if i%ctxCheckInterval == 0 {
+			if err := p.checkCtx(); err != nil {
+				return nil, err
+			}
+		}
 		if err := p.skipNestedSpace(); err != nil {
 			return nil, err
 		}