fix(ai-agent): use a non-workflow base system prompt for programmatic agent runs (#23394)

`AgentAsyncExecutorService` hardcoded `WORKFLOW_SYSTEM_PROMPTS.BASE`, so
every caller was told "You are executing as part of a workflow
automation" and "your output may be used by downstream workflow nodes".
That is only true for the workflow AI-agent action. The `runAgent` API
(used by apps such as the call recorder) and agent evaluations got the
same framing, which does not describe how they run or where their output
goes.

The executor no longer asserts its own execution context: `executeAgent`
now takes a required `baseSystemPrompt` and each caller supplies its
own.

- Workflow AI-agent action passes `WORKFLOW_SYSTEM_PROMPTS.BASE`
(unchanged behavior)
- `runAgent` and evaluations pass the new `AGENT_RUN_BASE_SYSTEM_PROMPT`

The param is required rather than defaulted so every call site states
its context and no future caller silently inherits the wrong one.

Prompt constants are also split one export per file, with the shared
tool-usage guidance extracted into `TOOL_USAGE_STRATEGY` so both bases
compose it.

No GraphQL schema, SDK, or database changes.


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packages/twenty-server/src/modules/workflow/workflow-executor/workflow-actions/ai-agent/ai-agent.workflow-action.ts

@@ -7,6 +7,7 @@ import { type WorkflowAction } from 'src/modules/workflow/workflow-executor/inte
 import { UsageOperationType } from 'src/engine/core-modules/usage/enums/usage-operation-type.enum';
 import { AgentAsyncExecutorService } from 'src/engine/metadata-modules/ai/ai-agent-execution/services/agent-async-executor.service';
 import { type AgentExecutionResult } from 'src/engine/metadata-modules/ai/ai-agent-execution/types/agent-execution-result.type';
+import { WORKFLOW_BASE_SYSTEM_PROMPT } from 'src/engine/metadata-modules/ai/ai-agent/constants/workflow-base-system-prompt.const';
 import { AgentEntity } from 'src/engine/metadata-modules/ai/ai-agent/entities/agent.entity';
 import { InjectWorkspaceScopedRepository } from 'src/engine/twenty-orm/workspace-scoped-repository/inject-workspace-scoped-repository.decorator';
 import { WorkspaceScopedRepository } from 'src/engine/twenty-orm/workspace-scoped-repository/workspace-scoped-repository';
@@ -84,6 +85,7 @@ export class AiAgentWorkflowAction implements WorkflowAction {
     const executionResult = await this.aiAgentExecutionService.executeAgent({
       agent,
       userPrompt: resolveInput(prompt, context) as string,
+      baseSystemPrompt: WORKFLOW_BASE_SYSTEM_PROMPT,
       actorContext: executionContext.isActingOnBehalfOfUser
         ? executionContext.initiator
         : undefined,