fix(web): fully remove payload runtime from production build

Remove ALL Payload imports, withPayload wrapper, and (payload)
routes. Blog index + changelog are now static data arrays.
Blog post at /blog/peer-messaging-claude-code is static TSX.

Payload CMS stays as a dev dependency for future local admin
but has zero presence in the production build.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/db/src/schema/mesh.ts

@@ -197,6 +197,7 @@ export const presence = meshSchema.table("presence", {
   status: presenceStatusEnum().notNull().default("idle"),
   statusSource: presenceStatusSourceEnum().notNull().default("jsonl"),
   statusUpdatedAt: timestamp().defaultNow().notNull(),
+  summary: text(),
   connectedAt: timestamp().defaultNow().notNull(),
   lastPingAt: timestamp().defaultNow().notNull(),
   disconnectedAt: timestamp(),