feat(paperless): add paperless-ai with local LLM for auto-tagging

- paperless-ai deployment using clusterzx/paperless-ai
- LLM via local api-gateway (reasoning model, no auth - phase 3 pending)
- Paperless API token SOPS-encrypted
- Auto-tags new documents, 5min scan interval
- Adds 'ai-processed' tag to classified documents

k8s/argocd/secrets/paperless-ai-secrets.enc.yaml

@@ -0,0 +1,23 @@
+apiVersion: ENC[AES256_GCM,data:l7I=,iv:NZY7r3JVW3zVwxeiScvWKpAQUDa9+nckHd0qWVrGU88=,tag:qpowp5OILdYKtTux/nlWpg==,type:str]
+kind: ENC[AES256_GCM,data:6oeEbuIk,iv:5flI9TtcYQ961wOYPBPhvQpitHFYAf8yMdNBXqytbJs=,tag:WNhlbKmSeZEqZ9ZgiB/BYg==,type:str]
+metadata:
+    name: ENC[AES256_GCM,data:fvJMsgy+wPZqMCdxm9hoV3n/+Q==,iv:I3rVtHIJBOME+bxhPws58Zjhj5i+KT5UtB9o7Vus5EU=,tag:6h4FnUu7PGxlQPIQxPYCRg==,type:str]
+    namespace: ENC[AES256_GCM,data:CDriLoLovROW,iv:rHXcN1xm5+t2D/Tq/2sx9lQFF8anD5jH24ZntPuBA8U=,tag:XstJAz6S8IM1c/pp9Cg0Ww==,type:str]
+type: ENC[AES256_GCM,data:JdTwBbag,iv:9Ys15Ketl0ghNK0u0N8IOpUt7+KoloutiG5M9zHPXxw=,tag:teau/udf41Ty34A5wLAm6Q==,type:str]
+stringData:
+    PAPERLESS_API_TOKEN: ENC[AES256_GCM,data:TuQeDx8po3h4loTRABlItVYQJ7gFjnmIn3zQQGtUcoNFMKpkqLK/GQ==,iv:TDg0stpca5pDtatqu8DFU7R0Bm/S/BI9ZoiG4K8mCT4=,tag:BfjX25V5gL7AeIsscClRAg==,type:str]
+sops:
+    age:
+        - enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBKVDN3aFVqVmFXY1VQVXZP
+            OUsrNHdNdlRvRFgvTDQrNE5uL2xaazVENTBjCkNPbGR5Vk16RXNDOW15OGNTRmFR
+            U0JOeTllaWU1dzNVY3lBbEVyVG5tOEkKLS0tIEZvajlvcUtJdFNNUkkzV3FKOFRj
+            UUE2TDBzT0xVc2E1NlUvQXAyZytMZEUKBv+ChaoQCstA742L3Bq5mBJlW/UC4Pyw
+            ZvFAyYbs1NaEqhjtHq+4T62jTWcH/St/vKgUuFQ9LCUQhYd8DUzAow==
+            -----END AGE ENCRYPTED FILE-----
+          recipient: age1e5fq3hwxy78psus2nfvmtmua36g0u3suk78ephw6246l974d2utsvn0hla
+    lastmodified: "2026-09-12T21:04:26Z"
+    mac: ENC[AES256_GCM,data:0ks96xQzOa8ygNDDYfKV8EJ8dWLBaC0PCnLG73NinMByF/KoWkCdwMDPC34W9xxVoTD2NiF1i/3pgCG4QFezTE7tPHPPKdYcQfwda9fkooiXW4Nh2M/sgbq/xgsy9N3qpHD/O5iILgpehb9y0DuErOyxcn2AIYizynU7m8e63pc=,iv:fvPWBsfE6YHskKzdlxJidp14dUgRR0XdMkEu6IxMMSo=,tag:5FiuIrFOg/GXvlQVy7drJQ==,type:str]
+    unencrypted_suffix: _unencrypted
+    version: 3.13.2

k8s/argocd/secrets/secret-generator.yaml

@@ -31,3 +31,4 @@ files:
   - gotify-tokens-secrets.enc.yaml
   - gotify-smtp-secrets.enc.yaml
   - forgejo-smtp-secrets.enc.yaml
+  - paperless-ai-secrets.enc.yaml