feat: Implement Living AI system

Complete implementation of the Living AI features:

Phase 1 - Foundation:
- MoodService: Valence-arousal mood model with time decay
- RelationshipService: Stranger→Close Friend progression
- Enhanced system prompt with personality modifiers

Phase 2 - Autonomous Learning:
- FactExtractionService: AI-powered fact extraction from conversations
- Rate-limited extraction (configurable, default 30%)
- Deduplication and importance scoring

Phase 3 - Personalization:
- CommunicationStyleService: Learn user preferences
- OpinionService: Bot opinion formation on topics
- SelfAwarenessService: Bot statistics and self-reflection

Phase 4 - Proactive Features:
- ProactiveService: Scheduled events (birthdays, follow-ups)
- Event detection from conversations
- Recurring event support

Phase 5 - Social Features:
- AssociationService: Cross-user memory connections
- Shared interest discovery
- Connection suggestions

New database tables:
- bot_states, bot_opinions, user_relationships
- user_communication_styles, scheduled_events
- fact_associations, mood_history

Configuration:
- Living AI feature toggles
- Individual command enable/disable
- All features work naturally through conversation when commands disabled

src/daemon_boyfriend/models/user.py

@@ -11,6 +11,7 @@ from .base import Base
 if TYPE_CHECKING:
     from .conversation import Conversation, Message
     from .guild import GuildMember
+    from .living_ai import ScheduledEvent, UserCommunicationStyle, UserRelationship
 
 
 class User(Base):
@@ -42,6 +43,17 @@ class User(Base):
         back_populates="user", cascade="all, delete-orphan"
     )
 
+    # Living AI relationships
+    relationships: Mapped[list["UserRelationship"]] = relationship(
+        back_populates="user", cascade="all, delete-orphan"
+    )
+    communication_style: Mapped["UserCommunicationStyle | None"] = relationship(
+        back_populates="user", cascade="all, delete-orphan", uselist=False
+    )
+    scheduled_events: Mapped[list["ScheduledEvent"]] = relationship(
+        back_populates="user", cascade="all, delete-orphan"
+    )
+
     @property
     def display_name(self) -> str:
         """Get the name to use when addressing this user."""