feat(topology): create 8 core tables with constraints and indexes

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

topology_api/migrations/003_indexes.sql

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+-- topology_api/migrations/003_indexes.sql
+-- Performance indexes for snapshot queries
+
+-- missions lookup
+CREATE INDEX IF NOT EXISTS idx_missions_base_status
+    ON topology.missions(base_id, occurrence_status);
+
+-- events time ordering
+CREATE INDEX IF NOT EXISTS idx_events_mission_time
+    ON topology.mission_events(mission_id, effective_at DESC, event_order DESC);
+CREATE INDEX IF NOT EXISTS idx_events_effective_time
+    ON topology.mission_events(effective_at DESC);
+
+-- components lookup
+CREATE INDEX IF NOT EXISTS idx_components_base
+    ON topology.components(base_id);
+
+-- versions time range
+CREATE INDEX IF NOT EXISTS idx_versions_component_time
+    ON topology.component_versions(component_id, valid_from DESC);
+CREATE INDEX IF NOT EXISTS idx_versions_current
+    ON topology.component_versions(component_id) WHERE valid_to IS NULL;
+
+-- states time range
+CREATE INDEX IF NOT EXISTS idx_states_component_kind_time
+    ON topology.component_states(component_id, state_kind, valid_from DESC);
+CREATE INDEX IF NOT EXISTS idx_states_current
+    ON topology.component_states(component_id, state_kind) WHERE valid_to IS NULL;
+
+-- connections time range
+CREATE INDEX IF NOT EXISTS idx_connections_base_time
+    ON topology.topology_connections(base_id, valid_from DESC);
+CREATE INDEX IF NOT EXISTS idx_connections_current
+    ON topology.topology_connections(base_id) WHERE valid_to IS NULL;
+
+-- ports
+CREATE INDEX IF NOT EXISTS idx_ports_component
+    ON topology.ports(component_id);