mcp-v0.23.6

Geographic filter on Discover lenses (product#3759).

• leadbay_new_lens / leadbay_adjust_audience now accept locations / exclude_locations — a geographic dimension on the Discover lens, mirroring the sector path. Free text (["Indre-et-Loire"], ["Texas"]) auto-resolves via /geo/search, or pass admin-area ids directly. Resolution happens first: ambiguous/unresolved text returns ambiguous_locations and the lens is not mutated (no half-built lens). Resolved ids merge into the lens filter as a location_ids criterion. Unblocks the "scope a territory → net-new accounts there" cockpit workflow — geography was previously settable only on the Monitor side.