feat: pause and resume jobs from the Python SDK (#4112)

Cancellation is the only job control the SDK exposes, and it is
terminal, so a long-running server-side job cannot be parked and picked
up again. This adds `pause_job` and `resume_job` to the Rust core
connection and the Python bindings (sync and async), posting to the
server's `/v1/jobs/pause` and `/v1/jobs/resume` endpoints.

A pause parks the job until it is resumed: its workers drain and stop.
The outcome strings mirror the server's answers — a job finalizing its
results reports `"committing"` and cannot be parked, and a resume before
the drain is confirmed reports `"still_pausing"`; both are retried
rather than failed. Resuming re-queues the job and its workers pick
their work back up from checkpoints. Local connections report the
operations as unsupported, like the rest of the jobs API.

docs/src/js/classes/Connection.md

@@ -823,6 +823,28 @@ abstract openTable(
 
 ***
 
+### pauseJob()
+
+```ts
+abstract pauseJob(jobId): Promise<string>
+```
+
+Pause a server-side job by id.
+
+The job's workers drain and it stays parked until resumed. Resolves to
+"pausing", "already_paused", or "committing" -- a job finalizing its
+results cannot be parked; retry shortly.
+
+#### Parameters
+
+* **jobId**: `string`
+
+#### Returns
+
+`Promise`&lt;`string`&gt;
+
+***
+
 ### renameTable()
 
 ```ts
@@ -856,6 +878,28 @@ a "not supported" error.
 
 ***
 
+### resumeJob()
+
+```ts
+abstract resumeJob(jobId): Promise<string>
+```
+
+Resume a paused server-side job by id.
+
+Its workers pick their work back up from checkpoints. Resolves to
+"resumed", "still_pausing" -- the pause's worker drain is not confirmed
+yet; retry shortly -- or "not_paused".
+
+#### Parameters
+
+* **jobId**: `string`
+
+#### Returns
+
+`Promise`&lt;`string`&gt;
+
+***
+
 ### ~~tableNames()~~
 
 #### tableNames(options)