release: bump version to 0.8.3

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: systemime

Makefile

@@ -3,7 +3,7 @@
 # Variables
 APP_NAME := mask-ctl
 SERVICE_BINARY := coding-plan-mask
-VERSION := 0.8.2
+VERSION := 0.8.3
 BUILD_DIR := build
 BIN_DIR := $(BUILD_DIR)/bin
 CMD_DIR := cmd/coding-plan-mask