Grammar: with-pk column specs use name(type), matching add column

`create table … with pk` parsed column types as `name:type`,
while `add column` uses `name(type)`. Unify on the parens
form so column-type syntax is consistent across the DSL:

    create table T with pk id(serial), name(text)

Only `COL_SPEC` changes (`:` → `( … )`); `build_create_table`
reads columns by role, so it is unaffected. The `:` that
separates table from column in `add column` / `drop column`
is unchanged. Sweeps the test suite, the typing-surface
matrix (two `after_colon` cells renamed to `after_paren`,
4 snapshots regenerated), the friendly catalog's usage
templates, ADR-0009's example, and requirements.md.

1039 passing / 0 failing / 1 ignored; clippy clean.

src/friendly/strings/en-US.yaml

@@ -248,7 +248,7 @@ help:
         messages [short|verbose]   — show or switch error-message verbosity (verbose is the default)
   ddl:
     create: |-
-        create table <T> with pk [<col>:<type>, ...]    — create a table
+        create table <T> with pk [<col>(<type>), ...]    — create a table
     drop: |-
         drop table <T>                                  — remove a table
         drop column [from] [table] <T>: <col> [--cascade]   — remove a column
@@ -371,7 +371,7 @@ parse:
   custom:
     replay_path_expected: "expected a path after `replay`"
     create_table_needs_pk: |-
-      tables need at least one column. Add `with pk` for a default `id INTEGER PRIMARY KEY`, or `with pk <name>:<type>` to choose. Use a comma-separated list for compound primary keys.
+      tables need at least one column. Add `with pk` for a default `id INTEGER PRIMARY KEY`, or `with pk <name>(<type>)` to choose. Use a comma-separated list for compound primary keys.
     on_action_specified_twice: "`on {target}` specified twice"
     change_column_flags_exclusive: "`--force-conversion` and `--dont-convert` are mutually exclusive — pick one."
     unknown_type: "unknown type '{found}' (expected one of: {expected})"
@@ -410,7 +410,7 @@ parse:
   # marks optional parts; angle-bracket `<...>` marks
   # placeholders. ADR-0009's surface conventions apply.
   usage:
-    create_table: "create table <Name> with pk [<col>:<type>[, ...]]"
+    create_table: "create table <Name> with pk [<col>(<type>)[, ...]]"
     drop_table: "drop table <Name>"
     drop_column: "drop column [from] [table] <Table>: <Name>"
     drop_relationship: |-