Fixes across existing pages: stale claude-3-sonnet -> current models,
deprecated ai/react + toAIStreamResponse -> current AI SDK APIs, five
divergent search signatures unified to client.search.memories (v4) /
client.search.documents (v3), singular containerTag in v4 contexts,
from-zep containerTag type error, canonical processing-status enum,
corrected 'v4 has no SDK' claim, internal links re-pointed at final
destinations.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
