feat: update strategy set schema fields

docs/api-examples.md

@@ -114,8 +114,9 @@ Response 200:
   ],
   "strategy_set": {
     "id": "stv-001",
-    "strategy_name": "target_value",
-    "strategy_config": "{}",
+    "name": "target_value",
+    "config": "{}",
+    "nick": "target_value:99914b932bd3",
     "created_at": "2026-04-03T00:00:00Z"
   },
   "live_quantity": null

docs/db-schema-spec.md

@@ -5,8 +5,10 @@
 This document defines the database schema in an AI-agent-friendly format.
 
 - Source of truth: Alembic revisions in `migrations/versions`
-- Current baseline revision: `20260403_0001`
-- Baseline file: `migrations/versions/20260403_0001_initial_portfolio_schema.py`
+- Current baseline revision: `20260403_0002`
+- Baseline files:
+	- `migrations/versions/20260403_0001_initial_portfolio_schema.py`
+	- `migrations/versions/20260403_0002_strategy_set_columns.py`
 
 ## 2. Scope
 
@@ -38,14 +40,16 @@ Columns:
 | Column | Type | Null | Default | Constraints / Notes |
 |---|---|---|---|---|
 | id | Text | NO | - | Primary Key |
-| strategy_name | Text | NO | - | Part of unique pair |
-| strategy_config | Text | NO | "" | Part of unique pair |
+| name | Text | NO | - | Strategy name, part of unique pair |
+| config | Text | NO | "" | Strategy config payload, part of unique pair |
+| nick | Text | NO | - | Unique strategy set nickname |
 | created_at | DateTime(timezone=True) | NO | NOW() | Creation timestamp |
 
 Constraints:
 
 - Primary key: `id`
-- Unique: `uq_strategy_sets_name_config` on (`strategy_name`, `strategy_config`)
+- Unique: `uq_strategy_sets_name_config` on (`name`, `config`)
+- Unique: `uq_strategy_sets_nick` on (`nick`)
 
 ### 4.2 portfolios
 
@@ -155,3 +159,4 @@ When schema changes:
 | Revision ID | File | Summary |
 |---|---|---|
 | 20260403_0001 | migrations/versions/20260403_0001_initial_portfolio_schema.py | Initial schema for strategy sets, portfolios, ledger, indexes, optional hypertable |
+| 20260403_0002 | migrations/versions/20260403_0002_strategy_set_columns.py | Rename `strategy_name`->`name`, `strategy_config`->`config`, add unique `nick` |

docs/portfoliohub-spec.md

@@ -275,6 +275,14 @@ Base routes:
 - `strategy_set: StrategySetResponse | null`
 - `live_quantity: float | null`
 
+`StrategySetResponse`
+
+- `id: str`
+- `name: str`
+- `config: str`
+- `nick: str`
+- `created_at: datetime | null`
+
 `LedgerEntryResponse`
 
 - Snapshot-oriented ledger response including balances after each action