## MODIFIED Requirements

### Requirement: Normalized content items
The system MUST normalize all ingested items (YouTube videos, Instagram posts, podcast episodes) into a single internal schema so the website can render them consistently.

The normalized item MUST include at minimum:
- `id` (stable within its source)
- `source` (`youtube`, `instagram`, or `podcast`)
- `url`
- `title`
- `publishedAt` (ISO-8601)
- `thumbnailUrl` (optional)

The system MUST support an optional summary field on normalized items when available from the source:
- `summary` (optional, short human-readable excerpt suitable for cards)

#### Scenario: Normalizing a YouTube video
- **WHEN** the system ingests a YouTube video item
- **THEN** it produces a normalized item containing `id`, `source: youtube`, `url`, `title`, and `publishedAt`

#### Scenario: Normalizing a podcast episode
- **WHEN** the system ingests a podcast RSS episode
- **THEN** it produces a normalized item containing `id`, `source: podcast`, `url`, `title`, and `publishedAt`

#### Scenario: Summary available
- **WHEN** an ingested item provides summary/description content
- **THEN** the normalized item includes a `summary` suitable for rendering in cards
