v0.0.4: Rebrand name to openings-mcp

What's Changed

• feat: wire up NVIDIA MCP tools by @amikai in #42
• feat: report upstream 4xx/5xx as upstream error: {code} by @amikai in #46
• docs: restyle README header with tagline and badges by @amikai in #45
• docs: remove badges row from README by @amikai in #47
• refactor: declare only 200 + default in provider openapi specs by @amikai in #48
• refactor: make 104 MCP outputs LLM-facing (jobCode, flat job-seeker fields) by @amikai in #49
• feat: wire TSMC careers into the MCP server by @amikai in #50
• feat: wire Google Careers into the MCP server by @amikai in #51
• Add tool annotations and server-level instructions by @amikai in #52
• feat: log raw JSON-RPC traffic and tool errors by @amikai in #53
• Refine server instructions for routing and query construction by @amikai in #54
• refactor: dedupe provider domain knowledge and prune dead code by @amikai in #55
• fix: validate Google enum inputs, clarify NVIDIA locations_text by @amikai in #56
• feat(release): inject version, commit, and date in builds by @amikai in #57
• Rename jobmcp to openings-mcp by @amikai in #58

Full Changelog: v0.0.3...v0.0.4