feat(ml): detector config in MLSettings with working defaults (#134 step 1)

Move the crop-proposer config (per-proposer enable + weights + conf, caps,
dedupe IoU) into the DB so it's UI-tunable and can be announced to the GPU agent
in the lease (like the embedder model) — no restart, agent env becomes
bootstrap-only. Migration 0078 adds the columns with working server_defaults so
existing rows + fresh installs crop out-of-the-box with all three proposers ON
(operator: default-on): person=yolo11n.pt, anatomy=booru_yolo yolov11m_aa22 (URL,
license unstated/private-homelab-OK), panel=mosesb best.pt. Plain columns, no
CHECK enum. Steps 2 (lease announce + agent apply) and 3 (Settings UI) follow.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CDgx8bQS5YrGRK76v8HUnM

backend/app/models/ml_settings.py

@@ -91,6 +91,70 @@ class MLSettings(Base):
     embedder_model_name: Mapped[str] = mapped_column(
         String(128), nullable=False, default="google/siglip2-so400m-patch16-512"
     )
+    # -- Crop proposers / detectors (#1202, #134) --------------------------
+    # WHERE-to-crop YOLO detectors feeding the crop→SigLIP bag + CCIP. Config
+    # lives HERE (DB) and is announced to the GPU agent in the lease — same as
+    # the embedder model — so it is UI-tunable with NO restart, and the agent's
+    # env is bootstrap-only. Each weights spec is an ultralytics builtin name,
+    # an http(s) URL, or "hf_repo::file" (agent's _resolve). enabled off (or an
+    # empty weights) skips that proposer. All ON by default (operator 2026-07-05)
+    # so a fresh install crops out-of-the-box.
+    # person: general COCO figure detector for Western/realistic art the anime
+    # person-detector misses → NMS-merged with imgutils → CCIP + concept.
+    detector_person_enabled: Mapped[bool] = mapped_column(
+        Boolean, nullable=False, default=True
+    )
+    detector_person_weights: Mapped[str] = mapped_column(
+        String(512), nullable=False, default="yolo11n.pt"
+    )
+    detector_person_conf: Mapped[float] = mapped_column(
+        Float, nullable=False, default=0.35
+    )
+    # anatomy: booru_yolo anime/furry/NSFW torso components → concept crops.
+    # Default = yolov11m_aa22 (26 classes, best mAP50-95 0.96), committed in the
+    # upstream repo so the URL resolves. License UNSTATED — fine for a private
+    # homelab (operator accepted #1202).
+    detector_anatomy_enabled: Mapped[bool] = mapped_column(
+        Boolean, nullable=False, default=True
+    )
+    detector_anatomy_weights: Mapped[str] = mapped_column(
+        String(512), nullable=False,
+        default=(
+            "https://github.com/aperveyev/booru_yolo/raw/main/models/"
+            "yolov11m_aa22.pt"
+        ),
+    )
+    detector_anatomy_conf: Mapped[float] = mapped_column(
+        Float, nullable=False, default=0.30
+    )
+    # panel: comic page → panel regions → concept crops (Apache-2.0, YOLOv12x).
+    detector_panel_enabled: Mapped[bool] = mapped_column(
+        Boolean, nullable=False, default=True
+    )
+    detector_panel_weights: Mapped[str] = mapped_column(
+        String(512), nullable=False,
+        default="mosesb/best-comic-panel-detection::best.pt",
+    )
+    detector_panel_conf: Mapped[float] = mapped_column(
+        Float, nullable=False, default=0.30
+    )
+    # Per-frame caps bound the crop→embed explosion; max_regions is the hard
+    # per-job backstop; dedupe_iou drops near-duplicate crops before the embed.
+    detector_max_figures: Mapped[int] = mapped_column(
+        Integer, nullable=False, default=8
+    )
+    detector_max_components: Mapped[int] = mapped_column(
+        Integer, nullable=False, default=8
+    )
+    detector_max_panels: Mapped[int] = mapped_column(
+        Integer, nullable=False, default=8
+    )
+    detector_max_regions: Mapped[int] = mapped_column(
+        Integer, nullable=False, default=128
+    )
+    detector_dedupe_iou: Mapped[float] = mapped_column(
+        Float, nullable=False, default=0.85
+    )
     updated_at: Mapped[datetime] = mapped_column(
         DateTime(timezone=True), nullable=False, server_default=func.now()
     )