docs: sync every page with what the repos ship (2026-08-29)

[VickyXAI]

Eight parallel diffs of the docs tree against the org's repos (ClawRouter
v0.12.250 + router-core, blockrun-llm 1.13.0, @blockrun/llm 3.13.2,
blockrun-llm-go v0.20.0, @blockrun/mcp 0.41.1, Franklin 3.42.0, the
gateway's merged PRs since 07-10, and the full org inventory). What was
wrong, by kind:

• APIs that do not exist: the Go page's entire client surface, Python's
  session_budget/achat/get_address/InsufficientBudgetError, TS's 'free'
  routing profile and testnetClient(), MCP's 'claude skill add', ClawRouter's
  costWeight/qualityWeight config, LangChain 0.x / AgentKit pre-0.7 code.
• Wrong secrets handling: two samples sent the wallet private key as a
  bearer token; the env var is BASE_CHAIN_WALLET_KEY in TS/ElizaOS, not
  BLOCKRUN_WALLET_KEY.
• Dead products documented as live: alpha-mcp (trading pages, since
  January), XRPL gateway (404, archived), devnet-sol (no DNS), nano-banana
  skill (archived). Franklin's built-in trading replaces alpha-mcp.
• Pricing policy: 'provider cost + 5%' on chat tokens in 9 places -> no
  margin since 2026-08-07, $0.001 per request; free tier 8/10 -> 5.
• Missing: 10 of 20 MCP tools, Solana-default wallets (ClawRouter,
  Franklin), Router Core V3.4, 402 rejection codes, reasoning_content,
  free-tier limits (30/min + 300/h), /v1/responses background mode, every
  org repo in the ecosystem page, changelog entries 07-29 -> 08-27.
• Franklin 3.42.0 pauses the swap tools; documented rather than hidden.

Marketing-number literals were left as published values (guarded).

Verification: site-side brand-numbers.docs.test.ts passes with one new dated-measurement exemption (benchmarks.md, 39 models, 2026-03-16 run); upstream-vendor grep clean; all relative .md links resolve; external links checked.