insta v0.1.12

What's Changed

• feat(billing): insta billing redeem (INS-749) by @CarmenDou in #307
• docs(skill): a new command says whether an agent can reach it by @CarmenDou in #305
• postgres always-on: don't confirm a change the database is still applying by @Fermionic-Lyu in #310
• chore(release): 0.1.12 by @CarmenDou in #313

Full Changelog: v0.1.11...v0.1.12