Audit all bots for fetch_signals stubs

[askmy-stack]

Background

Identified during OSS audit v2 of startupintel.

Problem Statement

Pattern beyond Runway.

Proposed Solution

Inventory + implement or document.

Acceptance Criteria

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

Files / Modules Affected

startupintel/bots/

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Suggested labels: priority:medium, difficulty:advanced, category:bug
Milestone: v2.0-features
OSS Audit: Master Backlog v2