v0.1.47

claude BYO custom-provider support (DIVE-51)

Run the Claude Code harness against a third-party Anthropic-compatible provider — DeepSeek, Kimi/Moonshot, or Z.ai/GLM — via --provider on --type=claude.

• 5dive agent create <name> --type=claude --provider=<deepseek|moonshot|zai> --api-key=- --auth-profile=<name> (key on stdin)
• Also wired into agent auth set claude --provider=… --auth-profile=… for swapping an existing agent's provider.
• Writes ANTHROPIC_BASE_URL / ANTHROPIC_AUTH_TOKEN / ANTHROPIC_DEFAULT_{OPUS,SONNET,HAIKU}_MODEL into the auth-profile's combined.env; profile-scoped so creds don't bleed into other claude agents.
• Verified model IDs/base URLs against vendor Claude-Code docs 2026-06-03.

BYO is opt-in and requires an auth-profile. Best-effort: the customer owns the provider ToS relationship.