Update resume infrastructure for job-specific customization

- Fix summary placeholders: 15 years development, 20 years professional experience
- Update Makefile to accept FILE_NAME parameter for building custom resumes
- Add confirmation message on successful PDF generation
- Document customization workflow in CLAUDE.md with examples
- Add section on creating tailored resumes from job descriptions
- Include security clearance and additional details in detailed resume

This enables a streamlined workflow: provide job description → Claude generates
customized markdown → build PDF with: make resume FILE_NAME=paul-halvorsen-[company]-[role]

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

Makefile

@@ -1,5 +1,5 @@
 USER=paul
-FILE_NAME=paul-halvorsen-resume
+FILE_NAME?=paul-halvorsen-resume
 
 NAME=build-paul-resume
 CONTAINER_NAME=${NAME}-container
@@ -18,6 +18,7 @@ resume: .podman-build
 		--name ${CONTAINER_NAME} \
 		${NAME} \
 		${FILE_NAME}.md -f markdown+yaml_metadata_block --template templates/jb2resume.latex -o ${FILE_NAME}.pdf
+	@echo "✓ Generated ${FILE_NAME}.pdf"
 
 .podman-build:
 	if [ ${CONTAINER_EXISTS} -ne 1 ]; then podman build -t ${NAME} . && echo "" > .podman-build; fi