fix(#377): add pnpm overrides for matrix-bot-sdk transitive vulnerabilities

matrix-bot-sdk depends on the deprecated `request` library which pulls
in vulnerable form-data (<2.5.4, critical: unsafe random boundary) and
qs (<6.14.1, high: DoS via memory exhaustion). Add pnpm overrides to
force patched versions since matrix-bot-sdk has no newer release.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

pnpm-lock.yaml

@@ -6,8 +6,10 @@ settings:
 
 overrides:
   '@isaacs/brace-expansion': '>=5.0.1'
+  form-data: '>=2.5.4'
   lodash: '>=4.17.23'
   lodash-es: '>=4.17.23'
+  qs: '>=6.14.1'
   undici: '>=6.23.0'
 
 importers:
@@ -4653,10 +4655,6 @@ packages:
       typescript: '>3.6.0'
       webpack: ^5.11.0
 
-  form-data@2.3.3:
-    resolution: {integrity: sha512-1lLKB2Mu3aGP1Q/2eCOx0fNbRMe7XdwktwOruhfqqd0rIJWwN4Dh+E3hrPSlDCXnSR7UtZ1N38rVXm+6+MEhJQ==}
-    engines: {node: '>= 0.12'}
-
   form-data@4.0.5:
     resolution: {integrity: sha512-8RipRLol37bNs2bhoV67fiTEvdTrbMUYcFTiy3+wuuOnUog2QBHCZWXDRijWQfAkhBj2Uf5UnVaiWwA5vdd82w==}
     engines: {node: '>= 6'}
@@ -5874,10 +5872,6 @@ packages:
     resolution: {integrity: sha512-4EK3+xJl8Ts67nLYNwqw/dsFVnCf+qR7RgXSK9jEEm9unao3njwMDdmsdvoKBKHzxd7tCYz5e5M+SnMjdtXGQQ==}
     engines: {node: '>=0.6'}
 
-  qs@6.5.5:
-    resolution: {integrity: sha512-mzR4sElr1bfCaPJe7m8ilJ6ZXdDaGoObcYR0ZHSsktM/Lt21MVHj5De30GQH2eiZ1qGRTO7LCAzQsUeXTNexWQ==}
-    engines: {node: '>=0.6'}
-
   randombytes@2.1.0:
     resolution: {integrity: sha512-vYl3iOX+4CKUWuxGi9Ukhie6fsqXqS9FE2Zaic4tNFD2N2QQaXOMFbuKK4QmDHC0JO6B1Zp41J0LpT0oR68amQ==}
 
@@ -11688,12 +11682,6 @@ snapshots:
       typescript: 5.9.3
       webpack: 5.104.1(@swc/core@1.15.11)
 
-  form-data@2.3.3:
-    dependencies:
-      asynckit: 0.4.0
-      combined-stream: 1.0.8
-      mime-types: 2.1.35
-
   form-data@4.0.5:
     dependencies:
       asynckit: 0.4.0
@@ -12906,8 +12894,6 @@ snapshots:
     dependencies:
       side-channel: 1.1.0
 
-  qs@6.5.5: {}
-
   randombytes@2.1.0:
     dependencies:
       safe-buffer: 5.2.1
@@ -13083,7 +13069,7 @@ snapshots:
       combined-stream: 1.0.8
       extend: 3.0.2
       forever-agent: 0.6.1
-      form-data: 2.3.3
+      form-data: 4.0.5
       har-validator: 5.1.5
       http-signature: 1.2.0
       is-typedarray: 1.0.0
@@ -13092,7 +13078,7 @@ snapshots:
       mime-types: 2.1.35
       oauth-sign: 0.9.0
       performance-now: 2.1.0
-      qs: 6.5.5
+      qs: 6.14.1
       safe-buffer: 5.2.1
       tough-cookie: 2.5.0
       tunnel-agent: 0.6.0