phase 16: fix UUID serialization in symbol registry responses

services/symbol_registry/app.py

@@ -1,7 +1,8 @@
 """Symbol Registry API - FastAPI application."""
 import re
+import uuid
 from contextlib import asynccontextmanager
-from typing import List, Optional
+from typing import Any, List, Optional
 from urllib.parse import urlparse
 
 import asyncpg
@@ -16,6 +17,15 @@ config = load_config()
 pool: Optional[asyncpg.Pool] = None
 
 
+def _row_dict(row: asyncpg.Record) -> dict[str, Any]:
+    """Convert asyncpg Record to dict with UUID→str coercion."""
+    d = dict(row)
+    for k, v in d.items():
+        if isinstance(v, uuid.UUID):
+            d[k] = str(v)
+    return d
+
+
 @asynccontextmanager
 async def lifespan(app: FastAPI):
     global pool
@@ -132,7 +142,7 @@ async def create_company(body: CompanyCreate):
         )
     except asyncpg.UniqueViolationError:
         raise HTTPException(409, f"Company {body.ticker} on {body.exchange} already exists")
-    return dict(row)
+    return _row_dict(row)
 
 
 @app.get("/companies", response_model=List[CompanyResponse])
@@ -141,7 +151,7 @@ async def list_companies(active: bool = True):
         "SELECT id, ticker, legal_name, exchange, sector, industry, market_cap_bucket, active FROM companies WHERE active = $1 ORDER BY ticker",
         active,
     )
-    return [dict(r) for r in rows]
+    return [_row_dict(r) for r in rows]
 
 
 @app.get("/companies/{company_id}", response_model=CompanyResponse)
@@ -152,7 +162,7 @@ async def get_company(company_id: str):
     )
     if not row:
         raise HTTPException(404, "Company not found")
-    return dict(row)
+    return _row_dict(row)
 
 
 @app.put("/companies/{company_id}", response_model=CompanyResponse)
@@ -166,7 +176,7 @@ async def update_company(company_id: str, body: CompanyCreate):
     )
     if not row:
         raise HTTPException(404, "Company not found")
-    return dict(row)
+    return _row_dict(row)
 
 
 # --- Alias Endpoints ---
@@ -177,7 +187,7 @@ async def add_alias(company_id: str, body: AliasCreate):
         "INSERT INTO company_aliases (company_id, alias, alias_type) VALUES ($1, $2, $3) RETURNING id, alias, alias_type",
         company_id, body.alias, body.alias_type,
     )
-    return dict(row)
+    return _row_dict(row)
 
 
 @app.get("/companies/{company_id}/aliases")
@@ -186,7 +196,7 @@ async def list_aliases(company_id: str):
         "SELECT id, alias, alias_type FROM company_aliases WHERE company_id = $1",
         company_id,
     )
-    return [dict(r) for r in rows]
+    return [_row_dict(r) for r in rows]
 
 
 # --- Watchlist Endpoints ---
@@ -200,13 +210,13 @@ async def create_watchlist(body: WatchlistCreate):
         )
     except asyncpg.UniqueViolationError:
         raise HTTPException(409, f"Watchlist '{body.name}' already exists")
-    return dict(row)
+    return _row_dict(row)
 
 
 @app.get("/watchlists")
 async def list_watchlists():
     rows = await pool.fetch("SELECT id, name, description, active FROM watchlists ORDER BY name")
-    return [dict(r) for r in rows]
+    return [_row_dict(r) for r in rows]
 
 
 @app.post("/watchlists/{watchlist_id}/members/{company_id}", status_code=201)
@@ -231,7 +241,7 @@ async def list_watchlist_members(watchlist_id: str):
            WHERE wm.watchlist_id = $1 ORDER BY c.ticker""",
         watchlist_id,
     )
-    return [dict(r) for r in rows]
+    return [_row_dict(r) for r in rows]
 
 
 # --- Source Endpoints ---
@@ -249,7 +259,7 @@ async def add_source(company_id: str, body: SourceCreate):
         company_id, body.source_type, body.source_name,
         body.config, body.credibility_score, body.retention_days, body.access_policy,
     )
-    return dict(row)
+    return _row_dict(row)
 
 
 @app.get("/companies/{company_id}/sources")
@@ -258,4 +268,4 @@ async def list_sources(company_id: str):
         "SELECT id, source_type, source_name, config, credibility_score, retention_days, access_policy, active FROM sources WHERE company_id = $1",
         company_id,
     )
-    return [dict(r) for r in rows]
+    return [_row_dict(r) for r in rows]