docs(bootstrap): add graphify knowledge graph section

Documents the graphify query-before-grep workflow for agents:
query/explain/path commands, auto-rebuild via post-commit hook,
and GRAPH_REPORT.md for broad architecture overview. Adds row
to the reading order table.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

documentation/BOOTSTRAP__AI_Agent_Quickstart.md

@@ -55,6 +55,19 @@ running in Docker. The frontend talks to it exclusively via the V3 REST API.
 - Read `documentation/TODO__Agents.md` — it has active tasks, known bugs, and context
   about what was recently changed and why.
 
+### Codebase Exploration — Use graphify First
+A persistent knowledge graph lives at `graphify-out/graph.json` (2,234 nodes, 4,651 edges,
+217 labeled communities). Query it before grepping or reading source files:
+
+```bash
+graphify query "how does badge printing work"   # BFS traversal — broad context
+graphify explain "db_save_ae_obj_li__ae_obj"    # plain-language node explanation
+graphify path "leads_loc" "ae_comp__leads"      # shortest path between two concepts
+```
+
+The graph is rebuilt automatically after every `git commit` (post-commit hook). For a
+broad architecture overview without a specific question, read `graphify-out/GRAPH_REPORT.md`.
+
 ### V3 API — Never Include the Object ID in PATCH Body Fields
 The ID is in the URL. Including it in `data_kv` causes a `400: Unknown column in SET`.
 ```ts
@@ -405,3 +418,4 @@ Start here, then go deeper as needed:
 | IDAA Recovery Meetings module | `documentation/MODULE__AE_IDAA_Recovery_Meetings.md` |
 | IDAA Video Conferences module | `documentation/MODULE__AE_IDAA_Video_Conferences.md` |
 | Naming conventions | `documentation/AE__Naming_Conventions.md` |
+| Codebase knowledge graph | `graphify-out/GRAPH_REPORT.md` |