The Plug records a pageview with a known ID (plug_ref) into the ETS
buffer. When JS connects, the LiveView hook supersedes that event by
ID and records its own with full data (screen_size from connect params).
If JS never connects, the Plug's event flushes normally after 10s.
Also fixes: admin browsing no longer leaks product_view events — the
Plug now sets no analytics session data for admins, so all downstream
visitor_hash guards naturally filter them out.
Replaces the previous time-based skip logic which was brittle and
race-prone. The supersede approach is deterministic and handles both
the ETS buffer and already-flushed DB cases.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Three-layer pipeline: Plug for all HTTP requests (no JS needed), LiveView
hook for SPA navigations, JS hook for screen width. ETS-backed buffer
batches writes to SQLite every 10s. Daily-rotating salt for visitor hashing.
Includes admin dashboard with date ranges, visitor trends, top pages,
sources, devices, and e-commerce conversion funnel. Oban cron for 12-month
data retention.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
