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/AMDRyzen7PRO4750G/catproc.txt

@@ -0,0 +1,27 @@
+processor	: 0
+vendor_id	: AuthenticAMD
+cpu family	: 23
+model		: 96
+model name	: AMD Ryzen 7 PRO 4750G with Radeon Graphics
+stepping	: 1
+microcode	: 0x8600103
+cpu MHz		: 1970.641
+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	: 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 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 ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba 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 rdpru 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	: 7186.58
+TLB size	: 3072 4K pages
+clflush size	: 64
+cache_alignment	: 64
+address sizes	: 48 bits physical, 48 bits virtual
+power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]

benchmark-data/data/hardware/AMDRyzen7PRO4750G/lscpu.txt

@@ -0,0 +1,36 @@
+アーキテクチャ:                      x86_64
+CPU 操作モード:                      32-bit, 64-bit
+バイト順序:                          Little Endian
+Address sizes:                       48 bits physical, 48 bits virtual
+CPU:                                 16
+オンラインになっている CPU のリスト: 0-15
+コアあたりのスレッド数:              2
+ソケットあたりのコア数:              8
+ソケット数:                          1
+NUMA ノード数:                       1
+ベンダー ID:                         AuthenticAMD
+CPU ファミリー:                      23
+モデル:                              96
+モデル名:                            AMD Ryzen 7 PRO 4750G with Radeon Graphics
+ステッピング:                        1
+Frequency boost:                     enabled
+CPU MHz:                             1360.124
+CPU 最大 MHz:                        3600.0000
+CPU 最小 MHz:                        1400.0000
+BogoMIPS:                            7186.58
+仮想化:                              AMD-V
+L1d キャッシュ:                      256 KiB
+L1i キャッシュ:                      256 KiB
+L2 キャッシュ:                       4 MiB
+L3 キャッシュ:                       8 MiB
+NUMA ノード 0 CPU:                   0-15
+Vulnerability Itlb multihit:         Not affected
+Vulnerability L1tf:                  Not affected
+Vulnerability Mds:                   Not affected
+Vulnerability Meltdown:              Not affected
+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 AMD retpoline, IBPB conditional, IBRS_FW, STIBP conditional, RSB filling
+Vulnerability Srbds:                 Not affected
+Vulnerability Tsx async abort:       Not affected
+フラグ:                              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 ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba 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 rdpru 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