feat: add self-evolution plugin — agent self-optimization system

Add a comprehensive self-evolution system that enables Hermes Agent
to continuously improve through automated analysis and optimization:

Core components:
- reflection_engine: Nightly session analysis (1:00 AM)
- evolution_proposer: Generate improvement proposals from insights
- quality_scorer: Multi-dimensional session quality evaluation
- strategy_injector: Inject learned strategies into new sessions
- strategy_compressor: Strategy optimization and deduplication
- git_analyzer: Code change pattern analysis
- rule_engine: Pattern-based rule generation
- feishu_notifier: Feishu card notifications for evolution events

Storage:
- db.py: SQLite telemetry storage
- strategy_store: Persistent strategy storage
- models.py: Data models

Plugin integration:
- plugin.yaml, hooks.py, __init__.py for plugin system
- cron_jobs.py for scheduled tasks

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

self_evolution/__init__.py

@@ -0,0 +1,43 @@
+"""
+Self Evolution Plugin
+=====================
+
+Agent self-optimization and continuous evolution system.
+
+Architecture:
+  - Telemetry: collects tool/session data via hooks
+  - Quality Scorer: evaluates session outcomes
+  - Dream Engine: nightly reflection at 1:00
+  - Evolution Proposer: generates improvement proposals
+  - Feishu Notifier: pushes proposals at 19:00 for user approval
+  - Evolution Executor: applies approved changes with rollback support
+  - Strategy Injector: injects learned hints into sessions
+
+Design references from Claude Code:
+  - conversation-analyzer (hookify): dream analysis pattern
+  - Ralph Wiggum: iterative evolution with rollback
+  - learning-output-style: session-start strategy injection
+  - rule_engine (hookify): conditional strategy matching
+"""
+
+from __future__ import annotations
+
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+def register(ctx) -> None:
+    """Plugin entry point — called by Hermes PluginManager.
+
+    Registers:
+      - 3 hooks: post_tool_call, on_session_end, pre_llm_call
+      - 3 slash commands: /evolve, /reflect, /evolution_status
+    """
+    from self_evolution.db import init_db
+    init_db()
+
+    from self_evolution.hooks import register_all as register_hooks
+    register_hooks(ctx)
+
+    logger.info("self_evolution plugin loaded: 3 hooks, telemetry active")