Expose PCZT getters and add governance wallet query methods#2

greg0x wants to merge 2 commits into

maint/zcash_client_sqlite-0.19.xvalargroup/librustzcash:maint/zcash_client_sqlite-0.19.xfrom

valargroup/pczt-governance-extensions-0.11valargroup/librustzcash:valargroup/pczt-governance-extensions-0.11Copy head branch name to clipboard