keep one account's failure from ending a batched run

Only SessionNotCreatedException was isolated. Every other way an account can
fail reached main() and took the accounts after it with them: a driver that
will not start for another reason, an unwritable profile directory, the first
page not loading, the browser dying mid-run, or quit() raising because it was
already gone. With REWARDS_ACCOUNTS=one,two,three and the middle one failing,
three never ran and main() exited on a traceback instead of an exit code.

Catch it around run_account, report it the way a failed task is reported, and
carry on. KeyboardInterrupt is left alone so Ctrl-C still stops the run. The
quit() in run_account is guarded too, so a tidy-up that raises no longer hides
the failure it was tidying up after.

README.md

@@ -80,7 +80,7 @@ Each is signed in once by hand, the same way as the single profile, using its ow
 msedge --user-data-dir="<repo>\data-dir\personal" --profile-directory=Default https://rewards.bing.com
 ```
 
-They run one after another, and a profile that fails to start is reported and skipped rather than ending the run. Leave `REWARDS_ACCOUNTS` unset and everything behaves exactly as before, using the single profile in `data-dir`.
+They run one after another, and an account that fails is reported and skipped rather than ending the run, whether it fails to start or dies partway through. Leave `REWARDS_ACCOUNTS` unset and everything behaves exactly as before, using the single profile in `data-dir`.
 
 # Docker
 

src/main.py

@@ -55,7 +55,16 @@ def run_account(account: accounts.Account) -> bool:
 		rewards = rewards_tasks.RewardsTaskUtils(driver)
 		rewards.complete_all_tasks()
 	finally:
+		try:
 			driver.quit()
+		except Exception as exc:
+			# quit() raises when the browser is already gone. Letting it out
+			# here would replace whatever actually went wrong with the tidy-up's
+			# own error, and the process it is meant to end is dead anyway.
+			logger.warning(
+				"%s: the driver did not shut down cleanly: %s",
+				account.name, log_utils.exception_summary(exc)
+			)
 
 	return True
 
@@ -76,8 +85,21 @@ def main() -> int:
 		if len(configured) > 1:
 			logger.info("=== account: %s ===", account.name)
 
+		# One account must not be able to end the batch. complete_all_tasks
+		# already contains a task that fails, and run_account names the profile
+		# that is already open, but everything else - a driver that will not
+		# start for some other reason, the browser dying mid-run, a page that
+		# never loads - reached here and took the remaining accounts with it.
+		# KeyboardInterrupt is deliberately not caught: Ctrl-C means stop.
+		try:
 			if run_account(account):
 				started += 1
+		except Exception as exc:
+			logger.error(
+				"[FAIL] %s: %s: %s",
+				account.name, type(exc).__name__, log_utils.exception_summary(exc),
+				exc_info=logger.isEnabledFor(logging.DEBUG)
+			)
 
 	if len(configured) > 1:
 		logger.info("%s/%s accounts ran", started, len(configured))