feat(nix): add librechat module and enable for server

WARNING: This commit includes new files and secrets modifications.

secrets/keys.yaml

@@ -1,5 +1,6 @@
 keys:
     cloudflare: ENC[AES256_GCM,data:p2IISOuU/ShoifW5OFY/6Bi6PI0iIiQoBfnV512f2z84U9QS/KEhzA==,iv:5AkwtNAK8mD2DbvXCtTeNeIrpF/GIsSyOYxy8G4Jsqo=,tag:u2xJcRBR5WTMWdzupx4tbQ==,type:str]
+    gemini: ENC[AES256_GCM,data:GwXVBsQdLesgP6PUZJRrLO5u6jd6XYFv9vjNTsojOwaWlxkDeRos,iv:w6Uz6j/MfpgQdIRYqJCneWqTsA+JEsB/T3cySVY2k3c=,tag:JY+LDar1UzC6qLKLichKnQ==,type:str]
 sops:
     age:
         - recipient: age12l33pas8eptwjc7ewux3d8snyzfzwz0tn9qg5kw8le79fswmjgjqdjgyy6
@@ -11,7 +12,7 @@ sops:
             T3VyZXZnaGZaMVBnVko2Tlc2S3FpdDQKRiHCOtkHKugfquQfYkk4o9SMtZlo1CqZ
             3i9+9Z516KS1+ERTklBUzZDBRZISY0c2nluO+tn71wnKAMIxetKryQ==
             -----END AGE ENCRYPTED FILE-----
-    lastmodified: "2025-07-08T18:05:51Z"
-    mac: ENC[AES256_GCM,data:YkQqkKw+OEKFtORp+WDwclazCk166JndSstoiJYbpdAKLxvEQLdScaGin7j0fIoeTCY1CytzAHAUt8iraZeHscIkPdz/3WGPOa23dt56ZEd+rK/OL+XIuOCsbz08+yVWgJWeeEeMZ8IinwA46kVVYI3+p4FxDBDXBvhl9x7+CG4=,iv:YHmM2mk2fKwefydYV29eEMaXlyHVKwyDZAHCnbnKb3Y=,tag:Ksb8N/1pnzDGpyGj8Z0fhg==,type:str]
+    lastmodified: "2025-07-08T19:37:17Z"
+    mac: ENC[AES256_GCM,data:Yel+wX5FjCntqxbvStDGs/Zzbgh6Ht2/7DmV4Xu8R/rVzjzGoO4DziEjpzaTLNxXLXbjfdOuucU9YPmdqSlf9FpjiB488Fjn7GMP53V74c7RiYZq3s+vpVIdnkEA52xgYqPY6sOJAoujjHJM3uRYgOM0XwkKONBfF5FrO6WdbvU=,iv:wg5U1V94oPUSnjCgMewW6L/dftOPWOgQl9qLF6o8Gps=,tag:SMqKnAKJBjCGHjPanjDk4A==,type:str]
     unencrypted_suffix: _unencrypted
     version: 3.10.2

secrets/librechat.yaml

@@ -0,0 +1,20 @@
+librechat:
+    creds_key: ENC[AES256_GCM,data:sELKgqif9ec6VV0Q9OVk8IbUAI5noPtUB1b1WrPvxjDzJODd9YoJHWiH+N0vwORje5LiuzqZ/0Kn/UMdPfy3qw==,iv:SFFW+P0vxy4s6TkaAyCNLLXLIBrdi8oMkm7Q/Vec/yk=,tag:ZNC0vMdyh+S204Qr0itvnw==,type:str]
+    creds_iv: ENC[AES256_GCM,data:h8RHcW7zt8CnKrYDGxlN/H9Wim4KpLaiFl2E2AK+YJY=,iv:xRctbyBFprN6Y1Lvk08EpzZNXa0owYCph+wqcOAR/Gw=,tag:ZdA0ibjyH1Y6DAd23mfJRQ==,type:str]
+    jwt_secret: ENC[AES256_GCM,data:mXMi0EenuU1EIZWUyLE3wkVTouJk2QPXIKV38sfwbKfjdc28GgdsaWtunaSpD4uYBrWCv1rXq5qj18ohlAKs/g==,iv:ZWZWgYzVQh+kRN4+EEBFdWc4aWGq5IDtlEVde9mzS7I=,tag:BmWQN9yI92RHJMy/pt8rRg==,type:str]
+    jwt_refresh_secret: ENC[AES256_GCM,data:iw+/E0wb2Ih1iQOaCCXBN5tj98Z2CdpaJMYOiuoTanjW7bvJXGfVObXKTBTtRs1P4TzCc4qK7mes5Sa6oajBpg==,iv:3mr3PYAjJ3bncATgfSwEyrIM2YioSfSu38NUfDmk6zs=,tag:RIYJ1YBaQVpwAmlo3CKg2Q==,type:str]
+sops:
+    age:
+        - recipient: age12l33pas8eptwjc7ewux3d8snyzfzwz0tn9qg5kw8le79fswmjgjqdjgyy6
+          enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSArcko2MmowTkpKaDJTdjZE
+            NVdzbklXZngxaHhrbkhGTXlCNDkzNml4dnlZCjRWOFZCSWRKenZzN0dhYXplVzh0
+            OVdaUnRkS2dIYklFS2dwUXVxaElxNkkKLS0tICtxZDV0a2hIaUM2NFBwOGwxcklz
+            YWJyU0VKRXFxT29TSjR1KzE0ZHJGQncKrX5Sujd617WgFDYA5r63K4ZwoJpP9m8M
+            xexbGVHAeSyWNjOG7x5A9gYC1/dG3NY2l5xoITn0NKi68ZEfGD/J3w==
+            -----END AGE ENCRYPTED FILE-----
+    lastmodified: "2025-07-08T19:37:50Z"
+    mac: ENC[AES256_GCM,data:LBkUPMR8D8+IVUugWzK4a51d0lkGJqnG5D9EkHC4aGXcuSpxpxkbUDXWsqK3u1FxxfCnR87ZhD+UGd3OV6Wvsl9/v968eC/3jxuZALnOgUGcTyUayo8qLq1J6HEFUDoUoH2tk/SF0Cn2r34fkcUd1NtRdQX+C0Zsc8Tk0zIRA8U=,iv:aUvg409sogxRBgYzNECW5eH7GsSAsYY9AHWmL0UD6PA=,tag:0pMoXeuF6DLCyIdDVsPmGA==,type:str]
+    unencrypted_suffix: _unencrypted
+    version: 3.10.2