Replace TimescaleDB with plain PostgreSQL

Fix Mac client box width in architecture diagram

Fix service box alignment — all boxes now 18 chars wide

Fix architecture diagram: proper closed rectangles for each service

Fix uneven service boxes in architecture diagram

Move Architecture after Prerequisites, clean up ASCII diagram

Add skills demo GIF: /add-endpoint subtract using Claude Code

Add AI skills (.claude/ .gemini/) to example app

Update demo GIF: Borg-themed Gemini 5.0 Ultra

Fix demo GIF: fzf now visibly selects hello-world session

Update demo GIF: cd into example app, claude refactors +1 to +2

Move demo GIF to Multi-Terminal section

Replace demo GIF with ts() → gemini workflow

Add animated demo GIF to README

Note ts() works in both .zshrc and .bashrc