OpenTelemetry tracing across bot pipeline

[askmy-stack]

Background

Identified during OSS audit v2 of startupintel.

Problem Statement

No distributed tracing.

Proposed Solution

OTel spans on BaseBot.run.

Acceptance Criteria

• Implementation complete
• Tests pass
• Documented in README or docs/

Files / Modules Affected

startupintel/bots/base.py

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Suggested labels: priority:low, difficulty:advanced, category:feature
Milestone: v3.0-platform
OSS Audit: Master Backlog v2