phaG curation notes

• O85207/PP_1408 is the experimentally characterized KT2440 protein connecting
  de novo fatty-acid synthesis to mcl-PHA production PMID:9727022.
• Purified PhaG transfers a 3-hydroxydecanoyl acyl group between CoA and ACP in
  vitro PMID:9727022. This
  supports GO:0016747 as an in-vitro acyltransferase activity, but does not establish that
  direct ACP-to-CoA transacylation is the native route.
• The correct UPA00212 module+pathway+taxon report identifies the competing
  thioesterase-plus-ligase model and PP_0763/Q88PT5 as a candidate activation
  enzyme, while emphasizing unresolved ligase paralogy
  [file:projects/P_PUTIDA/deep-research/PSEPK__mcl_pha_monomer_supply_from_fas__upa00212-deep-research-openscientist.md
  "whether a single dedicated 3HA-CoA ligase or several acyl-CoA synthetases"].
• The reusable module therefore records only PhaG-dependent routing as optional
  upstream context. It does not assert substrates/products for PhaG or require
  PP_0763 until native chemistry is resolved.