feat: 대역폭 추정 및 DAU 표시 기능 추가

- 동시접속자 기반 월간 대역폭 자동 추정
- DAU(일일활성사용자) 추정치 표시 (동접 × 10-14)
- 대역폭 기반 Linode/Vultr 자동 선택 로직
- 비용 분석에 대역폭 비용 포함
- 지역 미선택시 서울/도쿄/오사카/싱가포르 기본 표시
- 지역별 서버 분리 표시 (GROUP BY instance + region)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

benchmark-data/data/hardware/2xAMDEPYC755132-Core/catproc.txt

@@ -0,0 +1,26 @@
+processor	: 0
+vendor_id	: AuthenticAMD
+cpu family	: 23
+model		: 1
+model name	: AMD EPYC 7551 32-Core Processor
+stepping	: 2
+microcode	: 0x8001230
+cpu MHz		: 2000.000
+cache size	: 512 KB
+physical id	: 0
+siblings	: 64
+core id		: 0
+cpu cores	: 32
+apicid		: 0
+initial apicid	: 0
+fpu		: yes
+fpu_exception	: yes
+cpuid level	: 13
+wp		: yes
+flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc art rep_good nopl nonstop_tsc extd_apicid amd_dcm aperfmperf eagerfpu pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_l2 cpb hw_pstate sme retpoline_amd ssbd ibpb vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni xsaveopt xsavec xgetbv1 clzero irperf xsaveerptr arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif overflow_recov succor smca
+bogomips	: 3992.24
+TLB size	: 2560 4K pages
+clflush size	: 64
+cache_alignment	: 64
+address sizes	: 43 bits physical, 48 bits virtual
+power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]

benchmark-data/data/hardware/2xAMDEPYC755132-Core/lscpu.txt

@@ -0,0 +1,32 @@
+Architecture:          x86_64
+CPU op-mode(s):        32-bit, 64-bit
+Byte Order:            Little Endian
+CPU(s):                128
+On-line CPU(s) list:   0-127
+Thread(s) per core:    2
+Core(s) per socket:    32
+Socket(s):             2
+NUMA node(s):          8
+Vendor ID:             AuthenticAMD
+CPU family:            23
+Model:                 1
+Model name:            AMD EPYC 7551 32-Core Processor
+Stepping:              2
+CPU MHz:               2000.000
+CPU max MHz:           2000.0000
+CPU min MHz:           1200.0000
+BogoMIPS:              3992.24
+Virtualization:        AMD-V
+L1d cache:             32K
+L1i cache:             64K
+L2 cache:              512K
+L3 cache:              8192K
+NUMA node0 CPU(s):     0,8,16,24,32,40,48,56,64,72,80,88,96,104,112,120
+NUMA node1 CPU(s):     2,10,18,26,34,42,50,58,66,74,82,90,98,106,114,122
+NUMA node2 CPU(s):     4,12,20,28,36,44,52,60,68,76,84,92,100,108,116,124
+NUMA node3 CPU(s):     6,14,22,30,38,46,54,62,70,78,86,94,102,110,118,126
+NUMA node4 CPU(s):     1,9,17,25,33,41,49,57,65,73,81,89,97,105,113,121
+NUMA node5 CPU(s):     3,11,19,27,35,43,51,59,67,75,83,91,99,107,115,123
+NUMA node6 CPU(s):     5,13,21,29,37,45,53,61,69,77,85,93,101,109,117,125
+NUMA node7 CPU(s):     7,15,23,31,39,47,55,63,71,79,87,95,103,111,119,127
+Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc art rep_good nopl nonstop_tsc extd_apicid amd_dcm aperfmperf eagerfpu pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_l2 cpb hw_pstate sme retpoline_amd ssbd ibpb vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni xsaveopt xsavec xgetbv1 clzero irperf xsaveerptr arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif overflow_recov succor smca