fix: add blur op for mature deviations with blur-constrained tokens

Mature deviations are signed with a watermark-service token whose obj
carries a "blur": ">=N" constraint. The composed wixmp /v1/fit
transform had no blur operation, so wixmp rejected it with 403, which
the proxy passed through as a broken image.

buildMediaURL now decodes the token and, when it demands a blur, appends
a matching blur_N op to the transform (e.g. w_1280,h_1920,blur_10).
Unconstrained media and tokens that don't parse are left untouched, so
only media that requires it is affected.

Closes #14

0 files changed, 0 insertions, 0 deletions