refactor: remove the public-content swarm

Nodes registered the hashes of their public groups on the hub and nothing
ever read them back. Routes, model and node registration removed; a
migration drops swarm_sources. No node sends the hub a content hash now.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2 files changed, 38 insertions, 16 deletions

diff --git a/packages/meshbay-hub/src/meshbay_hub/db/migrations/versions/e6f7a8b9c0d1_drop_swarm_sources.py b/packages/meshbay-hub/src/meshbay_hub/db/migrations/versions/e6f7a8b9c0d1_drop_swarm_sources.py
new file mode 100644
index 0000000..0e61390
--- /dev/null
+++ b/packages/meshbay-hub/src/meshbay_hub/db/migrations/versions/e6f7a8b9c0d1_drop_swarm_sources.py
@@ -0,0 +1,38 @@
+"""drop the public-content swarm table
+
+Nodes registered the hashes of their public groups here and nothing ever read
+them back: the swarm was written and never used.
+
+Revision ID: e6f7a8b9c0d1
+Revises: c4d5e6f7a8b9
+"""
+
+from collections.abc import Sequence
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = "e6f7a8b9c0d1"
+down_revision: str | Sequence[str] | None = "c4d5e6f7a8b9"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    op.drop_index("ix_swarm_hash", table_name="swarm_sources")
+    op.drop_table("swarm_sources")
+
+
+def downgrade() -> None:
+    op.create_table(
+        "swarm_sources",
+        sa.Column("content_hash", sa.String(64), nullable=False),
+        sa.Column("node_id", sa.String(36), nullable=False),
+        sa.Column("endpoint", sa.String(128), nullable=False),
+        sa.Column("registered_at", sa.DateTime(timezone=True), nullable=False,
+                  server_default=sa.func.now()),
+        sa.Column("last_seen", sa.DateTime(timezone=True), nullable=False,
+                  server_default=sa.func.now()),
+        sa.PrimaryKeyConstraint("content_hash", "node_id"),
+    )
+    op.create_index("ix_swarm_hash", "swarm_sources", ["content_hash"])
diff --git a/packages/meshbay-hub/src/meshbay_hub/db/models.py b/packages/meshbay-hub/src/meshbay_hub/db/models.py
index 09eb437..288f1e7 100644
--- a/packages/meshbay-hub/src/meshbay_hub/db/models.py
+++ b/packages/meshbay-hub/src/meshbay_hub/db/models.py
@@ -266,22 +266,6 @@ class UserDevice(Base):
     __table_args__ = (Index("ix_user_devices_user", "user_id"),)
 
 
-class SwarmSource(Base):
-    """
-    Tracks which nodes can serve a given content hash (public swarm).
-    Hub maintains this for load-balanced public content delivery.
-    """
-    __tablename__ = "swarm_sources"
-
-    content_hash: Mapped[str] = mapped_column(String(64), primary_key=True)
-    node_id:      Mapped[str] = mapped_column(String(36), primary_key=True)
-    endpoint:     Mapped[str] = mapped_column(String(128), nullable=False)
-    registered_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=_now)
-    last_seen:    Mapped[datetime] = mapped_column(DateTime(timezone=True), default=_now)
-
-    __table_args__ = (Index("ix_swarm_hash", "content_hash"),)
-
-
 class Notification(Base):
     __tablename__ = "notifications"