API: 4.2 Implement Full-Text Search (q parameter)

[RobinGummels]

• Implement PostgreSQL full-text search across relevant fields
• Use for example TSVector for efficient text search
• Support relevance ranking
• Test search performance (keep limits from bid.md in mind)

[RobinGummels]

Make sure: All Text-Files are indexed. So you need to take a look in the documentation of 05_Indexes.sql to retrieve text from indexes.