chore: move plugins/ to separate repo, gitignore the directory

plugins/ is now tracked at bvandeusen/fabledscryer-plugins.
Removed tracked traefik files from this repo's index (files remain on disk).
Added plugins/ to .gitignore so the directory is ignored going forward.

PLUGIN_DIR in config.yaml still points to plugins/ for local dev and Docker.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

plugins/traefik/migrations/versions/traefik_001_initial.py

@@ -1,37 +0,0 @@
-# plugins/traefik/migrations/versions/traefik_001_initial.py
-"""Traefik metrics table
-
-Revision ID: traefik_001_initial
-Revises: (none — this is a branch off the core head via depends_on)
-Create Date: 2026-03-17
-"""
-from typing import Sequence, Union
-from alembic import op
-import sqlalchemy as sa
-
-revision: str = "traefik_001_initial"
-down_revision: Union[str, None] = None
-branch_labels: Union[str, Sequence[str], None] = "traefik"
-depends_on: Union[str, Sequence[str], None] = ("0004_app_settings",)
-
-
-def upgrade() -> None:
-    op.create_table(
-        "traefik_metrics",
-        sa.Column("id", sa.String(36), primary_key=True),
-        sa.Column("router_name", sa.String(255), nullable=False),
-        sa.Column("scraped_at", sa.DateTime(timezone=True), nullable=False),
-        sa.Column("request_rate", sa.Float, nullable=False),
-        sa.Column("error_rate_4xx_pct", sa.Float, nullable=False),
-        sa.Column("error_rate_5xx_pct", sa.Float, nullable=False),
-        sa.Column("latency_p50_ms", sa.Float, nullable=False),
-        sa.Column("latency_p95_ms", sa.Float, nullable=False),
-        sa.Column("latency_p99_ms", sa.Float, nullable=False),
-    )
-    op.create_index("ix_traefik_metrics_router_scraped", "traefik_metrics",
-                    ["router_name", "scraped_at"])
-
-
-def downgrade() -> None:
-    op.drop_index("ix_traefik_metrics_router_scraped", "traefik_metrics")
-    op.drop_table("traefik_metrics")