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/2xAMDEPYC766264-Core/catproc.txt

@@ -0,0 +1,27 @@
+processor	: 0
+vendor_id	: AuthenticAMD
+cpu family	: 23
+model		: 49
+model name	: AMD EPYC 7662 64-Core Processor
+stepping	: 0
+microcode	: 0x8301038
+cpu MHz		: 2434.394
+cache size	: 512 KB
+physical id	: 0
+siblings	: 128
+core id		: 0
+cpu cores	: 64
+apicid		: 0
+initial apicid	: 0
+fpu		: yes
+fpu_exception	: yes
+cpuid level	: 16
+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 xtopology nonstop_tsc cpuid extd_apicid aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate sme ssbd sev ibrs ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif umip rdpid overflow_recov succor smca
+bugs		: sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass
+bogomips	: 3992.49
+TLB size	: 3072 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/2xAMDEPYC766264-Core/lscpu.txt

@@ -0,0 +1,26 @@
+架構：               x86_64
+CPU 作業模式：       32-bit, 64-bit
+Byte Order:          Little Endian
+CPU(s):              256
+On-line CPU(s) list: 0-255
+每核心執行緒數：     2
+每通訊端核心數：     64
+Socket(s):           2
+NUMA 節點：          2
+供應商識別號：       AuthenticAMD
+CPU 家族：           23
+型號：               49
+Model name:          AMD EPYC 7662 64-Core Processor
+製程：               0
+CPU MHz：            2800.687
+CPU max MHz:         2000.0000
+CPU min MHz:         1500.0000
+BogoMIPS:            3992.49
+虛擬：               AMD-V
+L1d 快取：           32K
+L1i 快取：           32K
+L2 快取：            512K
+L3 快取：            16384K
+NUMA node0 CPU(s)：  0-63,128-191
+NUMA node1 CPU(s)：  64-127,192-255
+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 xtopology nonstop_tsc cpuid extd_apicid aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate sme ssbd sev ibrs ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif umip rdpid overflow_recov succor smca