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/AMDRyzen72700Eight-Core/catproc.txt

@@ -0,0 +1,27 @@
+processor	: 0
+vendor_id	: AuthenticAMD
+cpu family	: 23
+model		: 8
+model name	: AMD Ryzen 7 2700 Eight-Core Processor
+stepping	: 2
+microcode	: 0x800820d
+cpu MHz		: 1550.000
+cache size	: 512 KB
+physical id	: 0
+siblings	: 16
+core id		: 0
+cpu cores	: 8
+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 rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf 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_llc mwaitx cpb hw_pstate pti ssbd ibpb vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni xsaveopt xsavec xgetbv1 xsaves 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 sme sev sev_es
+bugs		: sysret_ss_attrs null_seg spectre_v1 spectre_v2 spec_store_bypass
+bogomips	: 6387.20
+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/AMDRyzen72700Eight-Core/lscpu.txt

@@ -0,0 +1,35 @@
+Arquitetura:                       x86_64
+Modo(s) operacional da CPU:        32-bit, 64-bit
+Tamanhos de endereço:              43 bits physical, 48 bits virtual
+Ordem dos bytes:                   Little Endian
+CPU(s):                            16
+Lista de CPU(s) on-line:           0-15
+ID de fornecedor:                  AuthenticAMD
+Nome do modelo:                    AMD Ryzen 7 2700 Eight-Core Processor
+Família da CPU:                    23
+Modelo:                            8
+Thread(s) per núcleo:              2
+Núcleo(s) por soquete:             8
+Soquete(s):                        1
+Step:                              2
+Aumento de frequência:             habilitado
+CPU MHz máx.:                      3200,0000
+CPU MHz mín.:                      1550,0000
+BogoMIPS:                          6387.28
+Opções:                            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 rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf 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_llc mwaitx cpb hw_pstate pti ssbd ibpb vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni xsaveopt xsavec xgetbv1 xsaves 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 sme sev sev_es
+Virtualização:                     AMD-V
+cache de L1d:                      256 KiB (8 instâncias)
+cache de L1i:                      512 KiB (8 instâncias)
+cache de L2:                       4 MiB (8 instâncias)
+cache de L3:                       16 MiB (2 instâncias)
+Nó(s) de NUMA:                     1
+CPU(s) de nó0 NUMA:                0-15
+Vulnerabilidade Itlb multihit:     Not affected
+Vulnerabilidade L1tf:              Not affected
+Vulnerabilidade Mds:               Not affected
+Vulnerabilidade Meltdown:          Not affected
+Vulnerabilidade Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl and seccomp
+Vulnerabilidade Spectre v1:        Mitigation; usercopy/swapgs barriers and __user pointer sanitization
+Vulnerabilidade Spectre v2:        Mitigation; Full AMD retpoline, IBPB conditional, STIBP disabled, RSB filling
+Vulnerabilidade Srbds:             Not affected
+Vulnerabilidade Tsx async abort:   Not affected