chore(context): regenerate derived adapters from the canonical root context

ContextAdapterDrift was firing for 13 repos. Picks up behaviour rule 7
("Finish what's closable"), which landed in ~/dev/.context/AGENT.md and never
reached any repo's derived files.

Where mcp.json changes, it also picks up root MCP config the repo was stale on:
brain/gitea/infra move from public hostnames to tailnet Serve URLs, and gitea's
bearer changes from GITEA_MCP_TOKEN to DMABE_GITEA_API_TOKEN — gitea-mcp
authenticates by pass-through and 401s on the former, so a harness syncing from
the old file had a dead gitea server and no signal saying so.

No literal secrets: mcp.json carries ${VAR} placeholders only.

CLAUDE.md deliberately unchanged — context-sync writes it from PROJECT.md alone,
since Claude Code walks up to ~/dev/CLAUDE.md for root context.

Refs mathias/infra ContextAdapterDrift

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

.context/mcp.json

@@ -3,6 +3,29 @@
     "knowledge": {
       "url": "http://localhost:3100/mcp",
       "description": "Project knowledge base — vector + graph retrieval"
+    },
+    "brain": {
+      "type": "http",
+      "url": "https://koala.tail30472e.ts.net:8443/mcp",
+      "headers": {
+        "Authorization": "Bearer ${BRAIN_MCP_TOKEN}"
+      }
+    },
+    "gitea": {
+      "_comment": "gitea-mcp authenticates by PASS-THROUGH: the bearer is a Gitea PAT it validates against Gitea and then acts as. GITEA_MCP_TOKEN -- which this entry used until 2026-09-08 -- 401s against it, so every harness synced from this file had a dead gitea server and no signal saying so. Probed 2026-09-08: GITEA_MCP_TOKEN 401, DMABE_GITEA_API_TOKEN 200, on both the public and the Serve URL.",
+      "type": "http",
+      "url": "https://koala.tail30472e.ts.net:8446/mcp",
+      "headers": {
+        "Authorization": "Bearer ${DMABE_GITEA_API_TOKEN}"
+      }
+    },
+    "infra": {
+      "_comment": "The bearer is belt-and-braces: this endpoint answers 200 with or without it, since Serve already limits reach to the tailnet. Sending it anyway means the day the server starts enforcing is not the day every harness breaks.",
+      "type": "http",
+      "url": "https://koala.tail30472e.ts.net:8444/mcp",
+      "headers": {
+        "Authorization": "Bearer ${INFRA_MCP_TOKEN}"
+      }
     }
   }
 }