docs(8.0): consistency-model concept + snapshots guide — Db API replaces branching docs

docs/eli5.md

@@ -59,7 +59,7 @@ Brainy can narrow any result set down by exact labels or ranges in the same brea
 
 - **Live dashboards.** You can define running totals that Brainy keeps updated automatically — things like "total sales this month by region" or "average response time per service." Every time new data comes in, the numbers stay current with no manual recalculation.
 
-- **Safe experiments.** You can branch your entire knowledge base — like branching code in version control — make changes on the branch, and either keep them or throw them away without ever touching the original.
+- **Time travel.** Every committed change becomes part of the database's history. You can pin the current state as a frozen view, see the whole knowledge base exactly as it was last week, try out changes in a scratch copy that never touches the real data, and take instant backups.
 
 - **Universal vocabulary.** Brainy ships with a shared language of 42 kinds of things (Person, Document, Task, Concept, Event…) and 127 kinds of connections (Contains, DependsOn, Creates, RelatedTo…). This means data from different sources speaks the same language without you having to translate.
 
@@ -101,11 +101,11 @@ Most applications that need to store and search knowledge end up stitching toget
 - Plus glue code, sync jobs, ETL pipelines, and 3am incidents
 
 **After Brainy** — one thing:
-Search, graph, filter, files, branches, and imports — unified in a single query.
+Search, graph, filter, files, time travel, and imports — unified in a single library.
 
 ### What Each Tool Is Missing
 
-| Tool | Search | Graph | Filter | VFS | Branch | Import |
+| Tool | Search | Graph | Filter | VFS | Time travel | Import |
 |---|:---:|:---:|:---:|:---:|:---:|:---:|
 | **Brainy** | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
 | *— Vector databases —* | | | | | | |
@@ -147,7 +147,7 @@ Add Cortex and you also unlock memory-mapped storage — aggregate state lives d
 - **Searchable knowledge bases** — Build institutional memory that links documents automatically and surfaces answers across the full web of related information.
 - **Semantic document search** — Index PDFs, code, or media and find them by meaning, not just keywords.
 - **Relationship-aware recommendations** — Power product catalogs or content platforms where every recommendation understands what connects to what.
-- **Safe experiments** — Let teams branch the knowledge base, experiment independently, and merge when ready — just like branching code.
+- **Safe experiments** — Test risky changes against a scratch copy of the knowledge base, audit exactly what changed and when, and roll back to any snapshot instantly.
 - **Unified business platforms** — Combine booking, CRM, inventory, and analytics in one queryable knowledge graph with no sync pipeline.
 
 ### What Brainy is good at