feat: bridge_self bot commands — status, thresholds, reset, health

Adds bot commands for the bridge_self provider so operators can inspect
and manage bridge health from chat: /status, /thresholds, /reset, /health.
Includes Jinja2 templates for both locales, seed data, capability slots,
and a handler that exposes pending deferred backlog plus per-counter
reset. Also adds .claude/skills/ for project-scoped graph-aware skills.

.claude/skills/debug-issue.md

@@ -0,0 +1,27 @@
+---
+name: Debug Issue
+description: Systematically debug issues using graph-powered code navigation
+---
+
+## Debug Issue
+
+Use the knowledge graph to systematically trace and debug issues.
+
+### Steps
+
+1. Use `semantic_search_nodes` to find code related to the issue.
+2. Use `query_graph` with `callers_of` and `callees_of` to trace call chains.
+3. Use `get_flow` to see full execution paths through suspected areas.
+4. Run `detect_changes` to check if recent changes caused the issue.
+5. Use `get_impact_radius` on suspected files to see what else is affected.
+
+### Tips
+
+- Check both callers and callees to understand the full context.
+- Look at affected flows to find the entry point that triggers the bug.
+- Recent changes are the most common source of new issues.
+
+## Token Efficiency Rules
+- ALWAYS start with `get_minimal_context(task="<your task>")` before any other graph tool.
+- Use `detail_level="minimal"` on all calls. Only escalate to "standard" when minimal is insufficient.
+- Target: complete any review/debug/refactor task in ≤5 tool calls and ≤800 total output tokens.