v0.2.0

69d9924 feat: phase 1 & 2 upgrade — metadata, policy thresholds, safety, profiles
1dfaf07 docs: update changelog for v0.2.0
fcecc9e feat: --profile flag for lint and GDT_ASSETS_PROFILE for hooks
3cbe8ba feat: policy profile system with override resolution
0b3e17c feat: conservative refs repair from rename manifests
7bede62 feat: rollback manifests and collision detection for rename
37b79a8 feat: rename operation plan with collision detection
d705f17 feat: add category field to diagnostics for grouping
702b42f feat: enhanced doctor with lint summary, ref check, and type breakdown
7dbd3b9 feat: power-of-two validation for images with UI exemption
07bc25a feat: policy-driven max size thresholds for all analyzers
69a8107 feat: scanner populates image dimensions during scan
f5bddc3 feat: add image metadata extraction via stdlib DecodeConfig
b3e5090 feat: introduce structured exit codes (0-4)