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/IntelXeonE5-2697v3/catproc.txt

@@ -0,0 +1,26 @@
+processor	: 0
+vendor_id	: GenuineIntel
+cpu family	: 6
+model		: 63
+model name	: Intel(R) Xeon(R) CPU E5-2697 v3 @ 2.60GHz
+stepping	: 2
+microcode	: 0x43
+cpu MHz		: 2997.866
+cache size	: 35840 KB
+physical id	: 0
+siblings	: 28
+core id		: 0
+cpu cores	: 14
+apicid		: 0
+initial apicid	: 0
+fpu		: yes
+fpu_exception	: yes
+cpuid level	: 15
+wp		: yes
+flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm cpuid_fault epb invpcid_single pti intel_ppin ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid cqm xsaveopt cqm_llc cqm_occup_llc dtherm ida arat pln pts md_clear flush_l1d
+bugs		: cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit
+bogomips	: 5197.01
+clflush size	: 64
+cache_alignment	: 64
+address sizes	: 46 bits physical, 48 bits virtual
+power management:

benchmark-data/data/hardware/IntelXeonE5-2697v3/lscpu.txt

@@ -0,0 +1,35 @@
+Arquitetura:                     x86_64
+Modo(s) operacional da CPU:      32-bit, 64-bit
+Ordem dos bytes:                 Little Endian
+Tamanhos de endereço:            46 bits physical, 48 bits virtual
+CPU(s):                          28
+Lista de CPU(s) on-line:         0-27
+Thread(s) per núcleo:            2
+Núcleo(s) por soquete:           14
+Soquete(s):                      1
+Nó(s) de NUMA:                   1
+ID de fornecedor:                GenuineIntel
+Família da CPU:                  6
+Modelo:                          63
+Nome do modelo:                  Intel(R) Xeon(R) CPU E5-2697 v3 @ 2.60GHz
+Step:                            2
+CPU MHz:                         2997.866
+CPU MHz máx.:                    3600,0000
+CPU MHz mín.:                    1200,0000
+BogoMIPS:                        5197.01
+Virtualização:                   VT-x
+cache de L1d:                    448 KiB
+cache de L1i:                    448 KiB
+cache de L2:                     3,5 MiB
+cache de L3:                     35 MiB
+CPU(s) de nó0 NUMA:              0-27
+Vulnerability Itlb multihit:     KVM: Mitigation: Split huge pages
+Vulnerability L1tf:              Mitigation; PTE Inversion; VMX conditional cache flushes, SMT vulnerable
+Vulnerability Mds:               Mitigation; Clear CPU buffers; SMT vulnerable
+Vulnerability Meltdown:          Mitigation; PTI
+Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl and seccomp
+Vulnerability Spectre v1:        Mitigation; usercopy/swapgs barriers and __user pointer sanitization
+Vulnerability Spectre v2:        Mitigation; Full generic retpoline, IBPB conditional, IBRS_FW, STIBP conditional, RSB filling
+Vulnerability Srbds:             Not affected
+Vulnerability Tsx async abort:   Not affected
+Opções:                          fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm cpuid_fault epb invpcid_single pti intel_ppin ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid cqm xsaveopt cqm_llc cqm_occup_llc dtherm ida arat pln pts md_clear flush_l1d