BambooHR adapter

[prPMDev]

Add BambooHR as a supported ATS platform. Public API endpoint: https://{slug}.bamboohr.com/careers/list. Returns job title, location, department. Follow existing adapter pattern in src/adapters/.

[prPMDev]

Research finding (2026-04-24): BambooHR does NOT have a truly public per-company JSON endpoint. Verified against primary docs and live endpoint tests.

• /careers/list and embed2.php redirect to marketing pages or render server-side HTML only
• Official API requires auth keys
• No public-JSON-per-company pattern like Greenhouse/Lever/Ashby

Recommendation: close this issue and replace BambooHR with better-verified alternatives in the roadmap. The easier wins are Recruitee, Personio, Workable (widget endpoint), and Teamtailor RSS — all have truly public no-auth endpoints and together cover significantly more ground than BambooHR would.

See notes/expansion-research.md for full verified catalog.