feat(database): add schema bootstrap and config

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

backend/app/models/__init__.py

@@ -7,6 +7,7 @@ from app.models.forum import ForumPost, ForumReply
 from app.models.agent import Agent, AgentMessage
 from app.models.conversation import Conversation, Message
 from app.models.knowledge_graph import KGNode, KGEdge
+from app.models.learning import LearningArtifactRecord, SessionRetrospectiveRecord
 from app.models.memory import MemorySummary, UserMemory
 from app.models.brain import (
     BrainEvent,
@@ -20,6 +21,7 @@ from app.models.brain import (
 from app.models.todo import DailyTodo, TodoSource
 from app.models.reminder import Reminder, ReminderStatus
 from app.models.goal import Goal, GoalStatus
+from app.models.skill import Skill
 from app.models.log import Log, LogType, LogLevel
 
 __all__ = [
@@ -38,6 +40,8 @@ __all__ = [
     "Message",
     "KGNode",
     "KGEdge",
+    "LearningArtifactRecord",
+    "SessionRetrospectiveRecord",
     "MemorySummary",
     "UserMemory",
     "BrainEvent",
@@ -53,6 +57,7 @@ __all__ = [
     "ReminderStatus",
     "Goal",
     "GoalStatus",
+    "Skill",
     "Log",
     "LogType",
     "LogLevel",

backend/app/models/skill.py

@@ -1,4 +1,4 @@
-from sqlalchemy import Column, String, Text, Boolean, JSON, ForeignKey
+from sqlalchemy import Column, String, Text, Boolean, JSON, ForeignKey, Float, Integer, DateTime
 from sqlalchemy.orm import relationship
 from app.models.base import BaseModel
 
@@ -17,6 +17,14 @@ class Skill(BaseModel):
     is_builtin = Column(Boolean, default=False, nullable=False)
     team_id = Column(String(36), ForeignKey("users.id"), nullable=True)
     is_active = Column(Boolean, default=True)
+    status = Column(String(20), default="active", nullable=False, index=True)  # candidate/shadow/active/deprecated/retired
+    scope = Column(JSON, default=list, nullable=False)
+    effectiveness = Column(Float, default=0.0, nullable=False)
+    review_after = Column(DateTime, nullable=True)
+    candidate_count = Column(Integer, default=0, nullable=False)
+    candidate_source_hashes = Column(JSON, default=list, nullable=False)
+    activation_count = Column(Integer, default=0, nullable=False)
+    last_activated_at = Column(DateTime, nullable=True)
     owner_id = Column(String(36), ForeignKey("users.id"), nullable=False)
 
     owner = relationship("User", foreign_keys=[owner_id])