v0.6.4

• Run provenance in catalog.json and daily/manifest.json moves to the STAC processing extension (v1.2.0), a standard any STAC reader understands, in place of the four cd: fields added in 0.6.3. The fields are now processing:version, processing:software ({"cd": "<sha>"}) and processing:datetime (the COG's CD_RUN_TIME tag, copied exactly), plus a processing-execution link to the GitHub Actions run that built the file. cd:variable and cd:period are unchanged. The COGs are not rebuilt, so their checksums and ETags stay the same and no cache downloads them again; only the two metadata documents are republished. (#128, #131)
• Producer side, the catalog and the manifest are both refused unless every item or entry carries the new keys, so a partial publish cannot mix the two vocabularies. scripts/catalog_publish.R and scripts/daily_publish.R --manifest-only republish the metadata alone and never upload a COG.