Add middleware to support tracing-like functionalities

[yunkon-kim]

• Add TracingHook to logger for logging ctx
• Add traceLogger
• Add tracing middleware
• Support a logger to be used in tracing middleware
  • Log to file, Loglevel=trace
• Update API docs
• Split the existing middlewares into individual files
  • It could be helpful to clearly show callers in logs
• Increase default LOGFILE_MAXSIZE 1000 MB

Tested by Beetle API
: Same 'traceId' (1726063245406771411), different 'spanId's (1726063245406790111, 1726063245407560511)
: Log to file at 'trace' level (separate from global log level)

Procedure
: Call GET /beetle/test/tracing
: Call GET /tumblebug/readyz with x-request-id (traceId)

Beetle log

{"level":"trace","traceId":"1726063245406771411","spanId":"1726063245406790111","URI":"/beetle/test/tracing","time":"2024-09-11T23:00:45+09:00","message":"[tracing] receive request"}
{"level":"info","traceId":"1726063245406771411","spanId":"1726063245406790111","time":"2024-09-11T23:00:45+09:00","caller":"pkg/api/rest/common/utility.go:137","message":"RestGetReadyz called"}
{"level":"trace","traceId":"1726063245406771411","spanId":"1726063245406790111","URI":"/beetle/test/tracing","time":"2024-09-11T23:00:45+09:00","message":"[tracing] send response"}
{"level":"info","id":"1726063245406771411","remote_ip":"::1","method":"GET","URI":"/beetle/test/tracing","status":200,"latency_human":"1.4672ms","bytes_in":"","bytes_out":36,"time":"2024-09-11T23:00:45+09:00","caller":"pkg/api/rest/middlewares/zerologger.go:56","message":"request"}

Tumblebug log

{"level":"trace","traceId":"1726063245406771411","spanId":"1726063245407560511","URI":"/tumblebug/readyz","time":"2024-09-11T14:00:45Z","message":"[tracing] receive request"}
{"level":"trace","traceId":"1726063245406771411","spanId":"1726063245407560511","URI":"/tumblebug/readyz","time":"2024-09-11T14:00:45Z","message":"[tracing] send response"}
{"level":"info","id":"1726063245406771411","client_ip":"172.21.0.1","method":"GET","URI":"/tumblebug/readyz","status":200,"latency_human":"80.5µs","bytes_in":"","bytes_out":36,"time":"2024-09-11T14:00:45Z","caller":"src/api/rest/server/middlewares/zerologger.go:57","message":"request"}

[yunkon-kim]

/approve