chore(release): 0.1.2 (#134)

Bundles the in-product Agent epic (#120, #121), the BYOK rollout on
cloud, the MCP toolkit expansion (#109, #110, #116, #117, #118), the
insights performance fix (#114), and the invite-accept flow rebuild
(#127, #129, #130) into a tagged release.

See CHANGELOG.md for the full notes.

v0.1.1

See CHANGELOG.md for the full release notes.

v0.1.0 — Initial open-source release