Update ocaml-pds and ocaml-sqlite test callers to match the
renamed constructor.

Replace Printf.sprintf with Fmt.str, Format.asprintf with Fmt.str,
Format.fprintf with Fmt.pf, and Format.formatter_of_buffer patterns
with Fmt.str "%a" across all test files.

Replace failwith (Fmt.str ...) with Fmt.failwith, and introduce err_*
helper functions for Error (Fmt.str ...) patterns across pid1, precommit,
qemu (qmp_protocol, vm), and requests (tls_config, websocket).

Remove test_ prefix from test function names across test files where
the module name already provides the Test namespace.

Strip get_/make_/find_/create_ from 138 function definitions and all
call sites across ocaml-pds, ocaml-pid1, ocaml-precommit,
ocaml-publicsuffix, ocaml-qemu, ocaml-requests, ocaml-retry, and
ocaml-rpmsg. Use Module.v for constructors per the E331 convention.

Add missing periods to doc comments, fix [name] format mismatches,
and add pp pretty-printer to Publicsuffix.t.

- ocaml-pds: test_blob_store (13 tests), test_sqlite_blockstore (14 tests)
- ocaml-publicsuffix: test_publicsuffix (21 tests, Mozilla PSL vectors),
test_publicsuffix_cmd (11 tests)
- ocaml-punycode: test_punycode_idna (51 tests, RFC 5891 IDNA vectors)
- ocaml-rpmsg: test_rpmsg (9 tests, Linux kernel rpmsg constants)

- xrpc_server: add on_listen callback with actual bound port (supports port 0)
- pds: register Eio.Switch.on_release for DB close in create/open_
- irmin: use on_listen in cmd_serve, close PDS in cmd_init, add interop cram test
- rpmsg: rename test_endpoint → test_rpmsg for consistency

- E410: Add periods to @param/@return/@raise doc comments in mdns.mli, paseto.mli, pbkdf2.mli
- E415: Add pp functions for type t in meross dnd and runtime modules
- E505: Create .mli files for pds blob_store and sqlite_blockstore
- E510: Add Logs.Src.create log sources to mdns_query.ml, timers.ml, triggers.ml

Change all test_*.mli to export val suite : string * unit Alcotest.test_case
list (singular tuple). Flatten multi-group test suites into single groups.
Fix incorrect v_* function renames in CLI call sites.

Add individual Alcotest test files for ocaml-atp (tid, handle, did, nsid,
record_key, at_uri, mst, car, block_map, blockstore, dagcbor, cid, blob_ref,
eio_error, lex, repo_key, varint), hermest (codegen_jsont, emitter,
lexicon_types, scc), standard-site, tangled, xrpc, xrpc-auth, and bloom.
Fix catch-all exception handlers (E105), redundant function prefixes (E331),
and expose parse functions in ocaml-arp for testability.

- License -> Licence
- color -> colour (in prose, not API/code)
- behavior -> behaviour
- analyze -> analyse
- organized -> organised
- Remove marketing buzzwords (leveraging)
- Remove emojis from prose

Convert all packages from:
(source (uri https://tangled.org/handle/repo))
to:
(source (tangled handle/repo))

This uses dune 3.21's native tangled support for cleaner source
declarations. Also removes redundant homepage/bug_reports fields
that are auto-generated from tangled sources.