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/services/user_profile.py

@@ -0,0 +1,56 @@
+"""User profile service — structured per-user preferences.
+
+Post-pivot the LLM-driven observation/consolidation surface is gone (curator
+deleted in Phase 8). The profile model is preserved as user-managed metadata
+(name, job, expertise, style, tone, interests, work schedule) — Claude can
+read it via the upcoming MCP profile tools.
+"""
+import logging
+
+from sqlalchemy import select
+
+from scribe.models import async_session
+from scribe.models.user_profile import UserProfile
+
+logger = logging.getLogger(__name__)
+
+VALID_EXPERTISE = {"novice", "intermediate", "expert"}
+VALID_STYLES = {"concise", "balanced", "detailed"}
+VALID_TONES = {"casual", "professional", "technical"}
+
+
+async def get_profile(user_id: int) -> UserProfile:
+    """Get or create the profile row for a user."""
+    async with async_session() as session:
+        result = await session.execute(
+            select(UserProfile).where(UserProfile.user_id == user_id)
+        )
+        profile = result.scalar_one_or_none()
+        if profile is None:
+            profile = UserProfile(user_id=user_id)
+            session.add(profile)
+            await session.commit()
+            await session.refresh(profile)
+        return profile
+
+
+async def update_profile(user_id: int, data: dict) -> UserProfile:
+    """Upsert structured profile fields from a validated dict."""
+    allowed = {
+        "display_name", "job_title", "industry", "expertise_level",
+        "response_style", "tone", "interests", "work_schedule",
+    }
+    async with async_session() as session:
+        result = await session.execute(
+            select(UserProfile).where(UserProfile.user_id == user_id)
+        )
+        profile = result.scalar_one_or_none()
+        if profile is None:
+            profile = UserProfile(user_id=user_id)
+            session.add(profile)
+        for key, value in data.items():
+            if key in allowed:
+                setattr(profile, key, value)
+        await session.commit()
+        await session.refresh(profile)
+    return profile