Add manual entry point to run pipeline on a single issue. Milestone: 0.0.2v

⛓️ Dependencies

• Depends on [v0.0.2] Implement Embedder Integration (Gemini/OpenAI) #2 (Embedder Integration)
• Depends on [v0.0.2] Implement VectorStore Integration (Qdrant) #3 (VectorStore Integration)
• Depends on [v0.0.2] Implement GitHub API Client #4 (GitHub API Client)
• Depends on [v0.0.2] Implement PendingActionScheduler step #5 (PendingActionScheduler)