Persist spans to DB via logger

Implement fire-and-forget span persistence:
- Add logSpanToDatabase and persistSpanToDatabase to logger
- Persist spans, attributes, events, and event attributes to new tables
- Wire edgeFunctionWrapper to call DB persistence after each span
- Create required tables, views, and security policies
- Ensure non-blocking and guard for missing Supabase creds

supabase/functions/_shared/edgeFunctionWrapper.ts

@@ -15,8 +15,9 @@ import {
   endSpan, 
   addSpanEvent, 
   logSpan,
+  logSpanToDatabase,
   extractSpanContextFromHeaders,
-  type Span 
+  type Span
 } from './logger.ts';
 import { formatEdgeError, toError } from './errorFormatter.ts';
 import { ValidationError, logValidationError } from './typeValidation.ts';
@@ -188,6 +189,7 @@ export function wrapEdgeFunction(
 
       endSpan(span, 'ok');
       logSpan(span);
+      logSpanToDatabase(span, requestId);
 
       // Clone response to add tracking headers
       const responseBody = await response.text();
@@ -221,6 +223,7 @@ export function wrapEdgeFunction(
         logValidationError(error, requestId, name);
         endSpan(span, 'error', error);
         logSpan(span);
+        logSpanToDatabase(span, requestId);
 
         const duration = span.endTime ? span.duration : Date.now() - span.startTime;
         
@@ -291,6 +294,7 @@ export function wrapEdgeFunction(
 
         endSpan(span, 'error', error);
         logSpan(span);
+        logSpanToDatabase(span, requestId);
 
         const duration = span.endTime ? span.duration : Date.now() - span.startTime;
 
@@ -333,6 +337,7 @@ export function wrapEdgeFunction(
 
       endSpan(span, 'error', error);
       logSpan(span);
+      logSpanToDatabase(span, requestId);
 
       const duration = span.endTime ? span.duration : Date.now() - span.startTime;