Finalize CleanMac v0.4.0 release documentation

[Dezoff-max]

What changed

• marked TASK-047 complete
• recorded the published v0.4.0 tag, workflow, assets, and validation evidence
• updated project analysis so v0.4.0 is the documented latest release
• documented the known mutable Finder metadata behavior on the local convenience app while preserving the fresh ZIP extraction as the release source of truth

Validation

• Release workflow 29220077936 passed
• downloaded CleanMac-125e528-unsigned.zip checksum passed
• fresh extraction reports version 0.4.0, build 5, and arm64
• strict ad-hoc signature validation passed
• GitHub Release is published as latest with accurate signing/notarization limitations
• git diff --check passed