Add migration diffs for documentation

Add .diff files to show incremental changes between migrations:
- 22_add_priority_to_resolution.sql.diff: shows priority field additions
- 23_html_fallback_routing.sql.diff: shows .html fallback logic addition

Makes it easier to review what changed in each migration without
comparing full function bodies.

Author: max-lt

.vscode/settings.json

@@ -1,3 +1,3 @@
 {
-  "cSpell.words": ["binstall", "psql", "reqwest"]
+  "cSpell.words": ["binstall", "prerendered", "psql", "reqwest"]
 }

migrations/22_add_priority_to_resolution.sql.diff

@@ -0,0 +1,35 @@
+--- /dev/fd/11	2026-02-03 01:57:33
++++ /dev/fd/12	2026-02-03 01:57:33
+@@ -17,6 +17,7 @@
+         v_result.project_id := NULL;
+         v_result.backend_type := 'worker'::enum_backend_type;
+         v_result.assets_storage_id := NULL;
++        v_result.priority := NULL;
+         RETURN v_result;
+     END IF;
+ 
+@@ -51,7 +52,7 @@
+ 
+     -- If we have a project, match route pattern
+     IF v_project_id_temp IS NOT NULL THEN
+-        SELECT backend_type, worker_id
++        SELECT backend_type, worker_id, priority
+         INTO v_route_record
+         FROM project_routes
+         WHERE project_id = v_project_id_temp
+@@ -69,6 +70,7 @@
+         v_result.project_id := v_project_id_temp;
+         v_result.worker_id := v_route_record.worker_id;
+         v_result.backend_type := v_route_record.backend_type;
++        v_result.priority := v_route_record.priority;
+ 
+         -- If storage backend, get ASSETS storage_config_id from main worker's environment
+         IF v_route_record.backend_type = 'storage' THEN
+@@ -96,6 +98,7 @@
+         v_result.project_id := NULL;
+         v_result.backend_type := 'worker'::enum_backend_type;
+         v_result.assets_storage_id := NULL;
++        v_result.priority := NULL;
+         RETURN v_result;
+     END IF;
+ 

migrations/23_html_fallback_routing.sql.diff

@@ -0,0 +1,11 @@
+--- /dev/fd/11	2026-02-03 01:56:12
++++ /dev/fd/12	2026-02-03 01:56:12
+@@ -59,6 +59,8 @@
+           AND (
+             pattern = p_path
+             OR (pattern LIKE '%/*' AND p_path LIKE REPLACE(pattern, '/*', '') || '%')
++            -- Allow /about.html to match route /about (prerendered fallback)
++            OR (p_path LIKE '%.html' AND pattern = REPLACE(p_path, '.html', ''))
+           )
+         ORDER BY priority DESC
+         LIMIT 1;