Add operator workspace tools

migrations/032_create_operator_notes.sql

@@ -0,0 +1,18 @@
+create table if not exists operator_notes (
+    id bigserial primary key,
+    instrument_id bigint not null references instruments(id),
+    note_scope text not null,
+    session_code text,
+    execution_id bigint references trade_executions(id),
+    signal_id bigint references trade_signals(id),
+    candidate_id bigint references trade_plan_candidates(id),
+    decision_packet_id bigint references decision_packets(id),
+    author text not null,
+    body text not null,
+    tags jsonb not null default '[]'::jsonb,
+    created_ts timestamptz not null,
+    updated_at timestamptz not null default now()
+);
+
+create index if not exists idx_operator_notes_instrument_created_desc
+on operator_notes (instrument_id, created_ts desc, id desc);