Expose event source inventory capabilities

[chubes4]

Summary

• Adds handler-owned source inventory capability metadata for event import sources.
• Registers source inventory metadata through the existing Data Machine filter without central handler maps.
• Covers Ticketmaster, Dice.fm, Universal Web Scraper, Event Flyer, and Single Recurring handlers.

Testing

• php -l on changed PHP files
• homeboy lint --path /Users/chubes/Developer/data-machine-events@feature-source-inventory-capabilities --extension wordpress --changed-only
• homeboy test --path /Users/chubes/Developer/data-machine-events@feature-source-inventory-capabilities --extension wordpress --force-hot -- --filter=SourceInventoryCapabilitiesTest

AI assistance

• AI assistance: Yes
• Tool(s): OpenCode (GPT-5.5)
• Used for: Drafted and validated the handler-owned capability metadata integration and focused tests.

[homeboy-ci]

Homeboy Results — data-machine-events

Audit

✅ audit — passed

• dead_code — 2 finding(s)
• field_patterns — 2 finding(s)
• test_coverage — 2 finding(s)
• intra-method-duplication — 1 finding(s)
• Total: 7 finding(s)

Deep dive: homeboy audit data-machine-events --changed-since b8a9f68

Tooling versions

• Homeboy CLI: homeboy 0.165.2+450f9df
• Extension: wordpress from https://github.com/Extra-Chill/homeboy-extensions
• Extension revision: 1a4bd8a
• Action: Extra-Chill/homeboy-action@v2