feat: 插件调用增加支持返回值提取

[mmagi]

希望能在插件调用的返回值部分增加动态参数类似http模块参数提取的功能，便于类似于数据库连接这样的插件使用，直接绑定具体返回值到字段，而不必再后面再加代码节点取数据了。

[gru-agent]

TestGru Assignment

Summary

Link	CommitId	Status	Reason
Detail	92d554f	🚫 Skipped	No files need to be tested {"packages/global/core/workflow/utils.ts":"target file(packages/global/core/workflow/utils.ts) not in work scope \n include: projects/app/src//*.ts \n exclude: node_modules,/.test.ts,**/.test.tsx,/*.spec.ts,/.spec.tsx,**/.d.ts,/*.test.js,/.spec.js","packages/service/core/workflow/dispatch/plugin/run.ts":"target file(packages/service/core/workflow/dispatch/plugin/run.ts) not in work scope \n include: projects/app/src/**/.ts \n exclude: node_modules,/*.test.ts,/.test.tsx,**/.spec.ts,/*.spec.tsx,/.d.ts,**/.test.js,**/*.spec.js"}

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[github-actions]

Preview Image: ghcr.io/labring/fastgpt-pr:92d554f30dc6f420bcb30adb6cba6865b37386a7

[gru-agent]

TestGru Assignment

Summary

Link	CommitId	Status	Reason
Detail	92d554f	🚫 Skipped	No files need to be tested {"packages/global/core/workflow/utils.ts":"target file(packages/global/core/workflow/utils.ts) not in work scope \n include: projects/app/src//*.ts \n exclude: node_modules,/.test.ts,**/.test.tsx,/*.spec.ts,/.spec.tsx,**/.d.ts,/*.test.js,/.spec.js","packages/service/core/workflow/dispatch/plugin/run.ts":"target file(packages/service/core/workflow/dispatch/plugin/run.ts) not in work scope \n include: projects/app/src/**/.ts \n exclude: node_modules,/*.test.ts,/.test.tsx,**/.spec.ts,/*.spec.tsx,/.d.ts,**/.test.js,**/*.spec.js"}

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[c121914yu]

目前看不出太多用处，保留考虑

[github-actions]

Preview mcp_server Image: ghcr.io/labring/fastgpt-pr:fatsgpt_mcp_server_289343f32b6c05ee59c8be182db0015602781063

[github-actions]

Preview sandbox Image: ghcr.io/labring/fastgpt-pr:fatsgpt_sandbox_289343f32b6c05ee59c8be182db0015602781063

[github-actions]

Preview fastgpt Image: ghcr.io/labring/fastgpt-pr:fatsgpt_289343f32b6c05ee59c8be182db0015602781063