chore(main): release 0.4.0

[release-please]

🤖 I have created a release beep boop

0.4.0 (2026-04-10)

⚠ BREAKING CHANGES

• update repo name (mcp-toolbox#​2968)

Features

• auth: Support opaque token validation for generic authService (mcp-toolbox#​2944) (c924701) (7e70dc8)
• bigquery: Add conversational analytics tools for Data Agents (mcp-toolbox#​2517) (2490a4b) (d210a15)
• cloudsqlpg: Run SELECT 1 after successful connection attempt (mcp-toolbox#​2997) (6ed9700) (7e70dc8)
• embeddingModel: Add Backend API selection fields (mcp-toolbox#​2592) (912aa9e) (d210a15)
• skills: Add Claude Code support to generated scripts (mcp-toolbox#​2966) (a1609e1) (d210a15)
• skills: Add codex user agent (mcp-toolbox#​2973) (070e939) (d210a15)
• skills: Tool invocation via npx (mcp-toolbox#​2916) (377dc5b) (d210a15)
• ui: Update to use /mcp endpoint (mcp-toolbox#​2829) (c3059c2) (d210a15)
• add claude code plugin config (#137) (c3392b3)
• add codex plugin config (#138) (071d0ec)
• Add MCP tool annotations to all remaining tools (mcp-toolbox#​2221) (ea09db9) (d210a15)
• skills: update skill scripts for the new toolbox binary (#144) (71f5b11)
• update repo name (mcp-toolbox#​2968) (d210a15)

Bug Fixes

• bigquery: Add impersonateServiceAccount to prebuilt config (mcp-toolbox#​2770) (9c3a748) (d210a15)
• quickstart: Robust tool lookup and modernize dependencies in Python samples (mcp-toolbox#​2863) (4c0845d) (d210a15)
• skills: Fix skill generation template (mcp-toolbox#​2914) (a01a15e) (d210a15)
• skills: Prevent empty strings overriding optional env vars in node scripts (mcp-toolbox#​2963) (c52adeb) (d210a15)
• tests/bigquery: Implement uuid-based isolation and reliable resource cleanup (mcp-toolbox#​2547) (479d842) (d210a15)
• tests/Bigtable: Implement uuid-based isolation and reliable resource cleanup (mcp-toolbox#​2880) (a769f15) (d210a15)
• add recursive flag to windows zip archive command (#129) (df7ce15)
• Update error for ConvertConfig function (mcp-toolbox#​2993) (62bdabb) (d210a15)
• Update repo name (mcp-toolbox#​2968) (3aae809) (d210a15)

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