feat(cli)!: export row-oriented results as JSON Lines (#5629)

* feat(cli): add JSON Lines output for row-oriented results (#5487)

- Support opt-in JSON Lines format (--format jsonl) for row-oriented results and collection views with clear record boundaries
- Preserve stable source identities and stream records deterministically line-by-line
- Emit final coverage and limitation metadata as a distinct line with https://rea.dev/schemas/jsonl-coverage-v1.json to prevent confusion with data rows
- Distinguish error outputs with https://rea.dev/schemas/jsonl-error-v1.json
- Reject non-row-oriented results that lack record boundaries with an unreadable_output error
- Document JSON Lines streaming conventions in docs/cli.md
- Add boundary tests covering empty results, multiline strings, partial coverage, large fields, and non-row rejection

* fix(cli): preserve diagnostics, provenance, and nested collections in JSONL

* fix(cli): frame classified failures and reject unrepresented JSONL facets

---------

Co-authored-by: gensokyo-dev <342580529+gensokyo-dev@users.noreply.github.com>

tests/support/cli/cliCommandSessionWorker.mjs

@@ -182,6 +182,7 @@ async function runOneShot(args) {
               return;
             }
             if (output.length > 0) wroteOutput = true;
+            if (resultOutput?.captureSdkOutput(output)) return;
             process.stdout.write(output);
           },
           exit: (code) => {
@@ -198,6 +199,10 @@ async function runOneShot(args) {
         const empty = renderEmptyFilteredCliOutput(outputOptions);
         if (empty) process.stdout.write(empty);
       }
+      await resultOutput?.finishSdkOutput(
+        explicitExit ??
+          (typeof process.exitCode === "number" ? process.exitCode : 0),
+      );
     }
   } finally {
     process.stdout.write = originalStdoutWrite;