Expand Turso's custom-function slots from 32 to 64

Turso's sqlite3_create_function_v2 has 32 pre-generated bridge
trampolines (MAX_CUSTOM_FUNCS). The driver registers 44 UDFs, so the
last 12 silently fail registration; SQL calls to from_base64 etc.
then fail with 'no such function'. Generate 32 more bridges.

Author: JanJakes

.github/workflows/phpunit-tests-turso.yml

@@ -105,6 +105,42 @@ jobs:
           print(f'patched {n} sqlite3_column_* functions')
           PY
 
+          # Turso's custom-function registry is capped at 32 pre-generated
+          # bridge trampolines; the driver registers 44 UDFs, so the last 12
+          # silently fail. Bump to 64 by adding 32 more func_bridge!/FUNC_BRIDGES
+          # entries.
+          python3 - <<'PY_FN_SLOTS'
+          p = 'sqlite3/src/lib.rs'
+          s = open(p).read()
+          old_max = 'const MAX_CUSTOM_FUNCS: usize = 32;'
+          new_max = 'const MAX_CUSTOM_FUNCS: usize = 64;'
+          assert old_max in s, 'MAX_CUSTOM_FUNCS not found'
+          s = s.replace(old_max, new_max, 1)
+
+          # Inject 32 more func_bridge! declarations after func_bridge_31.
+          bridge_marker = 'func_bridge!(31, func_bridge_31);\n'
+          assert bridge_marker in s
+          extra_bridges = ''.join(
+              f'func_bridge!({i}, func_bridge_{i});\n' for i in range(32, 64)
+          )
+          s = s.replace(bridge_marker, bridge_marker + extra_bridges, 1)
+
+          # Extend the FUNC_BRIDGES array: find the closing `];` of the
+          # static and inject the extra entries before it.
+          import re
+          pat = re.compile(
+              r'(static FUNC_BRIDGES: \[ScalarFunction; MAX_CUSTOM_FUNCS\] = \[\n'
+              r'(?:\s*func_bridge_\d+,\n)+)(\];\n)'
+          )
+          m = pat.search(s)
+          assert m is not None, 'FUNC_BRIDGES array not found'
+          extra_entries = ''.join(f'    func_bridge_{i},\n' for i in range(32, 64))
+          s = s[:m.start(2)] + extra_entries + s[m.start(2):]
+
+          open(p, 'w').write(s)
+          print('patched MAX_CUSTOM_FUNCS 32 -> 64')
+          PY_FN_SLOTS
+
           # SQLite looks up function names case-insensitively, but Turso's
           # extension registry stores names as-is and connection.rs looks
           # them up with HashMap::get directly. The driver's translator emits