feat: 实现 MediaMTX 分片分配与故障范围可观察 (#77)

Sense/scripts/build/build-windows.ps1

@@ -81,6 +81,7 @@ try {
     Copy-Item -LiteralPath (Join-Path $senseRoot 'config\sense.demo.env.example') -Destination (Join-Path $staging 'config\sense.demo.env.example')
     Copy-Item -LiteralPath (Join-Path $senseRoot 'config\sense.demo.env.example') -Destination (Join-Path $staging 'config\sense.demo.env')
     Copy-Item -LiteralPath (Join-Path $senseRoot 'config\mediamtx.yml') -Destination (Join-Path $staging 'config\mediamtx.yml')
+    Copy-Item -LiteralPath (Join-Path $senseRoot 'config\mediamtx-shards.example.json') -Destination (Join-Path $staging 'config\mediamtx-shards.example.json')
     Copy-Item -LiteralPath (Join-Path $serverRoot 'config\db.sql') -Destination (Join-Path $staging 'config\db.sql')
     Copy-Item -LiteralPath (Join-Path $serverRoot 'config\pg.sql') -Destination (Join-Path $staging 'config\pg.sql')
     Copy-Item -LiteralPath (Join-Path $senseRoot 'README-WINDOWS.md') -Destination (Join-Path $staging 'README-WINDOWS.md')

Sense/scripts/build/test-package.ps1

@@ -9,7 +9,7 @@ $required = @(
     'migrate-sense.bat', 'backup-sense.bat', 'restore-sense.bat',
     'initialize-admin.bat', 'README-WINDOWS.md', 'config\sense.env',
     'config\sense.env.example', 'config\sense.demo.env',
-    'config\mediamtx.yml', 'config\db.sql', 'config\pg.sql',
+    'config\mediamtx.yml', 'config\mediamtx-shards.example.json', 'config\db.sql', 'config\pg.sql',
     'web\index.html', 'scripts\runtime\sense-common.ps1'
 )
 foreach ($relative in $required) {

Sense/scripts/runtime/sense-common.ps1

@@ -7,7 +7,8 @@ $script:SenseAllowedEnvironment = @(
     'SENSE_CREDENTIAL_KEY', 'SENSE_ONVIF_DISCOVERY_IP',
     'SENSE_ONVIF_ALLOWED_CIDRS', 'SENSE_MEDIAMTX_MODE',
     'SENSE_MEDIAMTX_BINARY', 'SENSE_MEDIAMTX_CONFIG',
-    'SENSE_MEDIAMTX_API', 'SENSE_WEB_ROOT', 'SENSE_AUTO_MIGRATE',
+    'SENSE_MEDIAMTX_API', 'SENSE_MEDIAMTX_CAPACITY',
+    'SENSE_MEDIAMTX_SHARDS_FILE', 'SENSE_WEB_ROOT', 'SENSE_AUTO_MIGRATE',
     'SENSE_POSTGRES_BIN'
 )
 
@@ -185,6 +186,7 @@ function Initialize-SenseRuntime {
     }
     $mediaBinary = Resolve-SenseConfiguredPath -PackageRoot $PackageRoot -Value (Get-SenseEnvironmentValue -Name 'SENSE_MEDIAMTX_BINARY')
     $mediaConfig = Resolve-SenseConfiguredPath -PackageRoot $PackageRoot -Value (Get-SenseEnvironmentValue -Name 'SENSE_MEDIAMTX_CONFIG')
+    $mediaShardsFile = Resolve-SenseConfiguredPath -PackageRoot $PackageRoot -Value (Get-SenseEnvironmentValue -Name 'SENSE_MEDIAMTX_SHARDS_FILE')
     if ($mediaMode -eq 'managed') {
         if (-not (Test-Path -LiteralPath $mediaBinary -PathType Leaf)) { throw 'Managed MediaMTX binary not found. Set SENSE_MEDIAMTX_BINARY to mediamtx.exe.' }
         if (-not (Test-Path -LiteralPath $mediaConfig -PathType Leaf)) { throw 'Managed MediaMTX configuration not found. Set SENSE_MEDIAMTX_CONFIG.' }
@@ -192,6 +194,9 @@ function Initialize-SenseRuntime {
     if ($mediaMode -eq 'external' -and -not (Test-SenseTcpEndpoint -HostName $apiUri.Host -Port $apiUri.Port)) {
         throw "External MediaMTX Control API is unreachable at $($apiUri.Host):$($apiUri.Port)."
     }
+    if (-not [string]::IsNullOrWhiteSpace($mediaShardsFile) -and -not (Test-Path -LiteralPath $mediaShardsFile -PathType Leaf)) {
+        throw 'SENSE_MEDIAMTX_SHARDS_FILE does not exist.'
+    }
 
     $webRoot = Resolve-SenseConfiguredPath -PackageRoot $PackageRoot -Value (Get-SenseEnvironmentValue -Name 'SENSE_WEB_ROOT' -Default 'web')
     if (-not (Test-Path -LiteralPath (Join-Path $webRoot 'index.html') -PathType Leaf)) { throw 'Sense web assets are missing. Rebuild or replace the delivery package.' }
@@ -205,6 +210,7 @@ function Initialize-SenseRuntime {
         [Environment]::SetEnvironmentVariable('SENSE_MEDIAMTX_CONFIG', '', 'Process')
     }
     [Environment]::SetEnvironmentVariable('SENSE_MEDIAMTX_API', $mediaAPI, 'Process')
+    [Environment]::SetEnvironmentVariable('SENSE_MEDIAMTX_SHARDS_FILE', $mediaShardsFile, 'Process')
 
     $runtimeDir = Join-Path $PackageRoot 'data\runtime'
     $logDir = Join-Path $PackageRoot 'logs'