id: DATA-DB-005
title: Scenario Pre-Seeding from Bulk Downloads
status: backlog
priority: medium
dependencies:
  - DATA-DB-001
estimated_effort: 1-2 days
created: 2026-03-28
updated: 2026-03-28

description: |
  Create pre-configured scenario presets for gold hedging research and implement
  bulk download capability to pre-seed event comparison pages. This allows quick
  testing against historical events without per-event data fetching.

acceptance_criteria:
  - Default presets include COVID crash, rate hike cycle, gold rally events
  - Bulk download script fetches all preset data
  - Presets stored in config file (JSON/YAML)
  - Event comparison page shows preset data availability
  - One-click "Download All Presets" button
  - Progress indicator during bulk download

implementation_notes: |
  Default presets:
  - GLD March 2020 COVID Crash (extreme volatility)
  - GLD 2022 Rate Hike Cycle (full year)
  - GC=F 2024 Gold Rally (futures data)
  
  Bulk download flow:
  1. Create batch job for each preset
  2. Show progress per preset
  3. Store in cache directory
  4. Update preset availability status
  
  Preset format:
  - preset_id: unique identifier
  - display_name: human-readable name
  - symbol: GLD, GC, etc.
  - dataset: Databento dataset
  - window_start/end: date range
  - default_start_price: first close
  - default_templates: hedging strategies
  - event_type: crash, rally, rate_cycle
  - tags: for filtering

dependencies_detail:
  - DATA-DB-001: Needs cache infrastructure