refactor: rename package fabledassistant -> scribe (code-only)

Renames src/fabledassistant -> src/scribe and all imports, plus the
default DB name and DB user/password (fabled -> scribe) in config +
compose. 952 refs / 154 files. Reverses the old 'internal name stays
fabledassistant' convention.

Code-only: live databases are still physically named 'fabledassistant'.
Deployed environments must set POSTGRES_DB / POSTGRES_USER (or rename the
DB) since the defaults now resolve to 'scribe'. Repo (FabledScribe), git
host (fabledsword), MCP (fabled-git) and the image name (fabledscribe)
are intentionally unchanged.

ruff check src/ clean locally; CI (typecheck + pytest) is the gate.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/scribe/models/rulebook.py

@@ -0,0 +1,162 @@
+from datetime import datetime, timezone
+
+from sqlalchemy import BigInteger, Boolean, Column, DateTime, ForeignKey, Index, Integer, Table, Text, text
+from sqlalchemy.orm import Mapped, mapped_column
+
+from scribe.models import Base
+from scribe.models.base import SoftDeleteMixin
+
+
+class Rulebook(Base, SoftDeleteMixin):
+    __tablename__ = "rulebooks"
+
+    id: Mapped[int] = mapped_column(BigInteger, primary_key=True)
+    owner_user_id: Mapped[int] = mapped_column(
+        BigInteger, ForeignKey("users.id", ondelete="CASCADE")
+    )
+    title: Mapped[str] = mapped_column(Text)
+    description: Mapped[str | None] = mapped_column(Text, nullable=True)
+    always_on: Mapped[bool] = mapped_column(
+        Boolean, default=False, nullable=False, server_default="false"
+    )
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
+    )
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True),
+        default=lambda: datetime.now(timezone.utc),
+        onupdate=lambda: datetime.now(timezone.utc),
+    )
+
+    def to_dict(self) -> dict:
+        return {
+            "id": self.id,
+            "owner_user_id": self.owner_user_id,
+            "title": self.title,
+            "description": self.description or "",
+            "always_on": self.always_on,
+            "created_at": self.created_at.isoformat() if self.created_at else None,
+            "updated_at": self.updated_at.isoformat() if self.updated_at else None,
+        }
+
+
+class RulebookTopic(Base, SoftDeleteMixin):
+    __tablename__ = "rulebook_topics"
+    # Partial unique: a title is unique among LIVE topics in a rulebook, so a
+    # trashed topic doesn't block recreating/restoring the same title.
+    __table_args__ = (
+        Index(
+            "uq_topic_per_rulebook", "rulebook_id", "title",
+            unique=True, postgresql_where=text("deleted_at IS NULL"),
+        ),
+    )
+
+    id: Mapped[int] = mapped_column(BigInteger, primary_key=True)
+    rulebook_id: Mapped[int] = mapped_column(
+        BigInteger, ForeignKey("rulebooks.id", ondelete="CASCADE")
+    )
+    title: Mapped[str] = mapped_column(Text)
+    description: Mapped[str | None] = mapped_column(Text, nullable=True)
+    order_index: Mapped[int] = mapped_column(Integer, default=0)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
+    )
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True),
+        default=lambda: datetime.now(timezone.utc),
+        onupdate=lambda: datetime.now(timezone.utc),
+    )
+
+    def to_dict(self) -> dict:
+        return {
+            "id": self.id,
+            "rulebook_id": self.rulebook_id,
+            "title": self.title,
+            "description": self.description or "",
+            "order_index": self.order_index,
+            "created_at": self.created_at.isoformat() if self.created_at else None,
+            "updated_at": self.updated_at.isoformat() if self.updated_at else None,
+        }
+
+
+class Rule(Base, SoftDeleteMixin):
+    __tablename__ = "rules"
+    # Partial unique: title unique among LIVE rules in a topic (soft-deleted
+    # rules don't block recreating/restoring the same title).
+    __table_args__ = (
+        Index(
+            "uq_rule_per_topic", "topic_id", "title",
+            unique=True, postgresql_where=text("deleted_at IS NULL"),
+        ),
+    )
+
+    id: Mapped[int] = mapped_column(BigInteger, primary_key=True)
+    # Exactly one of topic_id / project_id is set — enforced by CHECK
+    # constraint ck_rule_topic_xor_project (migration 0059).
+    topic_id: Mapped[int | None] = mapped_column(
+        BigInteger,
+        ForeignKey("rulebook_topics.id", ondelete="CASCADE"),
+        nullable=True,
+    )
+    project_id: Mapped[int | None] = mapped_column(
+        BigInteger,
+        ForeignKey("projects.id", ondelete="CASCADE"),
+        nullable=True,
+        index=True,
+    )
+    title: Mapped[str] = mapped_column(Text)
+    statement: Mapped[str] = mapped_column(Text)
+    why: Mapped[str | None] = mapped_column(Text, nullable=True)
+    how_to_apply: Mapped[str | None] = mapped_column(Text, nullable=True)
+    order_index: Mapped[int] = mapped_column(Integer, default=0)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
+    )
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True),
+        default=lambda: datetime.now(timezone.utc),
+        onupdate=lambda: datetime.now(timezone.utc),
+    )
+
+    def to_dict(self) -> dict:
+        return {
+            "id": self.id,
+            "topic_id": self.topic_id,
+            "project_id": self.project_id,
+            "title": self.title,
+            "statement": self.statement,
+            "why": self.why or "",
+            "how_to_apply": self.how_to_apply or "",
+            "order_index": self.order_index,
+            "created_at": self.created_at.isoformat() if self.created_at else None,
+            "updated_at": self.updated_at.isoformat() if self.updated_at else None,
+        }
+
+
+# Pure many-to-many — no model class, just the join table.
+project_rulebook_subscriptions = Table(
+    "project_rulebook_subscriptions",
+    Base.metadata,
+    Column("project_id", BigInteger, ForeignKey("projects.id", ondelete="CASCADE"), primary_key=True),
+    Column("rulebook_id", BigInteger, ForeignKey("rulebooks.id", ondelete="CASCADE"), primary_key=True),
+    Column("created_at", DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)),
+)
+
+# Suppressions — let a project mute individual rules or whole topics from
+# rulebooks it subscribes to, without unsubscribing the rulebook itself.
+# FKs CASCADE so the row vanishes when its parent is removed.
+project_rule_suppressions = Table(
+    "project_rule_suppressions",
+    Base.metadata,
+    Column("project_id", BigInteger, ForeignKey("projects.id", ondelete="CASCADE"), primary_key=True),
+    Column("rule_id", BigInteger, ForeignKey("rules.id", ondelete="CASCADE"), primary_key=True),
+    Column("created_at", DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)),
+)
+
+project_topic_suppressions = Table(
+    "project_topic_suppressions",
+    Base.metadata,
+    Column("project_id", BigInteger, ForeignKey("projects.id", ondelete="CASCADE"), primary_key=True),
+    Column("topic_id", BigInteger, ForeignKey("rulebook_topics.id", ondelete="CASCADE"), primary_key=True),
+    Column("created_at", DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)),
+)