507 makefile fixes

[crivetimihai]

Closes #507

🚨 Critical Issues

• 1. Missing .PHONY Declarations - I can see lines 622-625 already include most targets including print-runtime, print-image, container-validate-env, container-check-ports, container-wait-healthy
• 2. Undefined Target Referenced - container-wait-healthy exists at line 852
• 11. Wrong Dependency Name in container-validate - Line 823 correctly uses container-check-ports

⚠️ Important Issues

• 3. Platform-Specific Commands Without Checks - Both issues fixed:
  • Line 835: lsof check exists with proper handling
  • Line 732: systemctl check exists with proper handling
• 4. IBM Cloud Target Missing File Check - Line 1267: ibmcloud-check-env has the check @test -f .env.ce || {...}
• 5. Clean Target Missing Files
• 6. Inconsistent xargs Usage - Still has bare -r in devpi-stop
• 12. Local PyPI Port/URL Mismatch - Fixed to consistently use port 8085
• 13. Orphaned .PHONY Marker - N/A (no orphaned marker found)
• 14. shfmt PATH Issue - Fixed with SHFMT variable and multiple location checks
• 15. Hard-coded --platform=linux/amd64 - Fixed with auto-detection at line 631
• 16. docker buildx Builder Never Re-used - Fixed at line 798 with existence check
• 17. Conflicting Flags in compose-restart - Fixed at line 1095 - now separate pull and build commands

📝 Minor Issues

• 7. Static Container File - Line 614 dynamically detects: CONTAINER_FILE ?= $(shell [ -f "Containerfile" ] && echo "Containerfile" || echo "Dockerfile")
• 8. Test File Assumption - Line 314: pytest-examples has the check for test_readme.py
• 9. Shell Script Finding - Line 2933: SHELL_SCRIPTS excludes all the directories
• 10. Unused Variable - SED_INPLACE still defined but unused
• 18. Non-Persistent Error Handling - Line 179: clean target uses bash -eu -o pipefail -c
• 19. Duplicate .PHONY Declarations - Actually no duplicate found - YAML/JSON/TOML linters are only in LINTERS list, not separate .PHONY