Bump version to 1.0.2

- Add scripts/bump-version.sh for semver patch increments
- Update AGENTS.md Dev Commands section and add Version Bumping docs
- Makefile default VERSION bumped to 1.0.2

scripts/bump-version.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
+MAIN_GO="$PROJECT_DIR/cmd/server/main.go"
+MAKEFILE="$PROJECT_DIR/Makefile"
+
+CURRENT=$(grep -oE 'var version = "[0-9]+\.[0-9]+\.[0-9]+"' "$MAIN_GO" | grep -oE '[0-9]+\.[0-9]+\.[0-9]+')
+if [[ -z "$CURRENT" ]]; then
+    echo "ERROR: cannot parse version from $MAIN_GO" >&2
+    exit 1
+fi
+
+IFS='.' read -r MAJOR MINOR PATCH <<< "$CURRENT"
+NEW_PATCH=$((PATCH + 1))
+NEW="${MAJOR}.${MINOR}.${NEW_PATCH}"
+
+echo "Bumping version: $CURRENT → $NEW"
+
+sed -i '' "s/var version = \"${CURRENT}\"/var version = \"${NEW}\"/" "$MAIN_GO"
+sed -i '' "s/VERSION?=${CURRENT}/VERSION?=${NEW}/" "$MAKEFILE"
+
+echo "Done. Updated to $NEW"
+echo ""
+echo "Next steps:"
+echo "  git add cmd/server/main.go Makefile"
+echo "  git commit -m 'Bump version to ${NEW}'"
+echo "  git push"