Reintroduce TFE duration metadata: DB columns, form fields, controllers, views, and migration

Add 'unsafe-eval' to CSP script-src directives (htmx requires Function())

app/storage/schema.sql.new

@@ -1318,6 +1318,8 @@ CREATE TABLE IF NOT EXISTS theses (
     remarks TEXT, -- Internal remarks
 
     -- Duration/size
+    duration_value REAL,
+    duration_unit TEXT DEFAULT 'pages',
     access_type_id INTEGER,
     license_id INTEGER,
 
@@ -4347,6 +4349,8 @@ SELECT
     ft.name as finality_type,
     t.synopsis,
     t.context_note,
+    t.duration_value,
+    t.duration_unit,
     at.name as access_type,
     lt.name as license_type,
     t.license_id,