chore(release): release Buzz Desktop version 0.4.17

[wesbillman]

Buzz Desktop release v0.4.17

Changes since v0.4.16:

• fix(desktop): onboarding defaults — API key field and model search (#2081) (741610f13)
• feat(desktop): show agent owners in messages (#2080) (463db6de3)
• fix(desktop): restore onboarding provider choices (#2079) (b18a79476)
• Fix Claude onboarding terminal popup (#2078) (f125f0868)
• fix(desktop): complete request access flow (#2073) (426497a18)
• fix(desktop): preserve profile descriptions across communities (#2068) (0dda0ad2f)
• Fix membership-denied community onboarding recovery (#2072) (f347dcac2)
• feat(desktop): add channel archive and delete actions (#2067) (929d3aa12)
• fix(desktop): restore channel browsing and add recent sorting (#2065) (2cb7753fa)
• feat(desktop): polish onboarding harness (#2039) (66a0f7bcb)
• Expose model selection for provider-locked runtimes (#2071) (3ad180a60)
• Speed up the Welcome kickoff and show the team arriving (#2066) (1fdb73e17)
• Add identity key help and reveal toggle to machine onboarding (#2064) (1bdd93849)
• fix(desktop): keep Private toggle when picking a channel template (#2070) (89bcbd826)
• fix(agents): explain why Create/Save is disabled and fix Codex/Claude gate (#2050) (87dc4dccb)
• fix(desktop): recover relay-closed subscriptions (#2060) (79598bdb3)

To release: merge this PR. The tag and build will happen automatically.