docs: reconcile hib_changes onto flat structure

Bring over comprehensive documentation, CLI tools, and project
scaffolding from the archived v2/ branch onto the rebuilt flat
main. All v2/ path references updated to match flat layout.

- docs/: architecture, decisions, phases, progress, findings, etc.
- docker/tempo: telemetry stack (Grafana + Tempo)
- CLAUDE.md, .claude/CLAUDE.md: comprehensive project guides
- CHANGELOG.md, TODO.md, README.md: project meta
- consult, ctx: CLI tools
- .gitignore: merged entries from both branches

.gitignore

@@ -26,3 +26,18 @@ sidecar/node_modules
 *.njsproj
 *.sln
 *.sw?
+
+# Python
+__pycache__/
+*.pyc
+*.pyo
+
+# Project-specific
+/CLAUDE.md
+/plugins/
+projects/
+.playwright-mcp/
+.audit/
+.tribunal/
+.local/
+debug/