fix: inappropriate default timeout of syslog schema

[nic-6443]

Description

We use 3 as the default timeout configuration in the syslog plugin. This configuration will eventually be used as the timeout configuration of the lua-resty-logger-socket library, and its unit is milliseconds.

It is obviously inappropriate to use 3 milliseconds as the default configuration, because it is easy to trigger a timeout. I think the author of the syslog plugin should have mistakenly thought that the timeout unit in lua-resty-logger-socket is seconds, so 3 is used as the default value.

So this PR modifies the default value to 3000, and clarifies the timeout unit in the documentation.

apisix/apisix/plugins/syslog.lua

Line 36 in 51eec3e

timeout = {type = "integer", minimum = 1, default = 3},

apisix/apisix/plugins/syslog.lua

Lines 90 to 101 in 51eec3e

	local logger, err = core.lrucache.plugin_ctx(
	lrucache, api_ctx, nil, logger_socket.new, logger_socket, {
	host = conf.host,
	port = conf.port,
	flush_limit = conf.flush_limit,
	drop_limit = conf.drop_limit,
	timeout = conf.timeout,
	sock_type = conf.sock_type,
	pool_size = conf.pool_size,
	tls = conf.tls,
	}
	)

https://github.com/cloudflare/lua-resty-logger-socket/blob/master/README.md?plain=1#L102-L104

timeout

Sets the timeout (in ms) protection for subsequent operations, including the connect method. Default value is 1000 (1 sec).

Checklist

• I have explained the need for this PR and the problem it solves
• I have explained the changes or the new features added to this PR
• I have added tests corresponding to this change
• I have updated the documentation to reflect this change
• I have verified that this change is backward compatible (If not, please discuss on the APISIX mailing list first)

[starsz]

Good capture.