feat: v1.2.0-rc.1 - IndieWeb Features Release Candidate

Complete implementation of v1.2.0 "IndieWeb Features" release.

## Phase 1: Custom Slugs
- Optional custom slug field in note creation form
- Auto-sanitization (lowercase, hyphens only)
- Uniqueness validation with auto-numbering
- Read-only after creation to preserve permalinks
- Matches Micropub mp-slug behavior

## Phase 2: Author Discovery + Microformats2
- Automatic h-card discovery from IndieAuth identity URL
- 24-hour caching with graceful fallback
- Never blocks login (per ADR-061)
- Complete h-entry, h-card, h-feed markup
- All required Microformats2 properties
- rel-me links for identity verification
- Passes IndieWeb validation

## Phase 3: Media Upload
- Upload up to 4 images per note (JPEG, PNG, GIF, WebP)
- Automatic optimization with Pillow
  - Auto-resize to 2048px
  - EXIF orientation correction
  - 95% quality compression
- Social media-style layout (media top, text below)
- Optional captions for accessibility
- Integration with all feed formats (RSS, ATOM, JSON Feed)
- Date-organized storage with UUID filenames
- Immutable caching (1 year)

## Database Changes
- migrations/006_add_author_profile.sql - Author discovery cache
- migrations/007_add_media_support.sql - Media storage

## New Modules
- starpunk/author_discovery.py - h-card discovery and caching
- starpunk/media.py - Image upload, validation, optimization

## Documentation
- 4 new ADRs (056, 057, 058, 061)
- Complete design specifications
- Developer Q&A with 40+ questions answered
- 3 implementation reports
- 3 architect reviews (all approved)

## Testing
- 56 new tests for v1.2.0 features
- 842 total tests in suite
- All v1.2.0 feature tests passing

## Dependencies
- Added: mf2py (Microformats2 parser)
- Added: Pillow (image processing)

Version: 1.2.0-rc.1

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

docs/decisions/ADR-057-media-attachment-model.md

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+# ADR-057: Media Attachment Model
+
+## Status
+Accepted
+
+## Context
+The v1.2.0 media upload feature needed a clear model for how media relates to notes. Initial design assumed inline markdown image insertion (like a blog editor), but user feedback clarified that notes are more like social media posts (tweets, Mastodon toots) where media is attached rather than inline.
+
+Key insights from user:
+- "Notes are more like tweets, thread posts, mastodon posts etc. where the media is inserted is kind of irrelevant"
+- Media should appear at the TOP of notes when displayed
+- Text content should appear BELOW media
+- Multiple images per note should be supported
+
+## Decision
+We will implement a social media-style attachment model for media:
+
+1. **Database Design**: Use a junction table (`note_media`) to associate media files with notes, allowing:
+   - Multiple media per note (max 4)
+   - Explicit ordering via `display_order` column
+   - Per-attachment metadata (captions)
+   - Future reuse of media across notes
+
+2. **Display Model**: Media attachments appear at the TOP of notes:
+   - 1 image: Full width display
+   - 2 images: Side-by-side layout
+   - 3-4 images: Grid layout
+   - Text content always appears below media
+
+3. **Syndication Strategy**:
+   - RSS: Embed media as HTML in description (universal support)
+   - ATOM: Use both `<link rel="enclosure">` and HTML content
+   - JSON Feed: Use native `attachments` array (cleanest)
+
+4. **Microformats2**: Multiple `u-photo` properties for multi-photo posts
+
+## Rationale
+**Why attachment model over inline markdown?**
+- Matches user mental model (social media posts)
+- Simplifies UI/UX (no cursor tracking needed)
+- Better syndication support (especially JSON Feed)
+- Cleaner Microformats2 markup
+- Consistent display across all contexts
+
+**Why junction table over array column?**
+- Better query performance for feeds
+- Supports future media reuse
+- Per-attachment metadata
+- Explicit ordering control
+- Standard relational design
+
+**Why limit to 4 images?**
+- Twitter limit is 4 images
+- Mastodon limit is 4 images
+- Prevents performance issues
+- Maintains clean grid layouts
+- Sufficient for microblogging use case
+
+## Consequences
+
+### Positive
+- Clean separation of media and text content
+- Familiar social media UX pattern
+- Excellent syndication feed support
+- Future-proof for media galleries
+- Supports accessibility via captions
+- Efficient database queries
+
+### Negative
+- No inline images in markdown content
+- All media must appear at top
+- Cannot mix text and images
+- More complex database schema
+- Additional JOIN queries needed
+
+### Neutral
+- Different from traditional blog CMSs
+- Requires grid layout CSS
+- Media upload is separate from text editing
+
+## Alternatives Considered
+
+### Alternative 1: Inline Markdown Images
+Store media URLs in markdown content as `![alt](url)`.
+- **Pros**: Traditional blog approach, flexible positioning
+- **Cons**: Poor syndication, complex editing UX, inconsistent display
+
+### Alternative 2: JSON Array in Notes Table
+Store media IDs as JSON array column in notes table.
+- **Pros**: Simpler schema, fewer tables
+- **Cons**: Poor query performance, no per-media metadata, violates 1NF
+
+### Alternative 3: Single Media Per Note
+Restrict to one image per note.
+- **Pros**: Simplest implementation
+- **Cons**: Too limiting, doesn't match social media patterns
+
+## Implementation Notes
+
+1. Migration will create both `media` and `note_media` tables
+2. Feed generators must query media via JOIN
+3. Template must render media before content
+4. Upload UI shows thumbnails, not markdown insertion
+5. Consider lazy loading for performance
+
+## References
+- [IndieWeb multi-photo posts](https://indieweb.org/multi-photo)
+- [Microformats2 u-photo property](https://microformats.org/wiki/h-entry#u-photo)
+- [JSON Feed attachments](https://jsonfeed.org/version/1.1#attachments)
+- [Twitter photo upload limits](https://help.twitter.com/en/using-twitter/tweeting-gifs-and-pictures)