feat(cloudflared): manage tunnel ingress locally via ConfigMap

The tunnel was remotely managed from the Zero Trust dashboard: the
Deployment ran 'run --token' and ignored the ConfigMap that already
existed in the tree. Switch to a locally-managed tunnel so the ingress
routing table lives in git.

- deployment: mount cloudflared-config (config.yml) and the
  cloudflared-credentials Secret; drop TUNNEL_TOKEN env
- configmap.yaml: per-hostname ingress rules to ingress-nginx via the
  CoreDNS rewrite, plus a 404 catch-all
- secret-generator: register the SOPS-encrypted credentials file
- homelab-ca: add the cloudflared namespace copy so the connector trusts
  the ingress certificate (force-ssl-redirect makes plaintext impossible)

Credentials were extracted from the live cloudflared-token Secret and
re-encrypted with SOPS; no plaintext secret is committed.

k8s/argocd/secrets/cloudflared-credentials.enc.yaml

@@ -0,0 +1,23 @@
+apiVersion: v1
+kind: Secret
+metadata:
+    name: cloudflared-credentials
+    namespace: cloudflared
+type: Opaque
+stringData:
+    credentials.json: ENC[AES256_GCM,data:LnJVGuxJAOwDYbLgX00OHICDDldZgwgvGafOIwKoJKnjg3FjFMQYThNCOL/H+6tctuKixJNcAckjg70tmCKWxNq9I35XX/YSqob6Qv4fywv32hsNIAe44BU035MGZ5zmc6bZZ8wAgTJZw6Th4TzY7taFBCRdj2fW4T+qVfq7strn68G4ufVMK6UXlOkEDLjR2Vxj32lqSLdbdMma96XB+265hwL6IVfaugG662mcGhPwgHk=,iv:NFmyHN5m2mJUBgn1qgmJZ2YgkFxBZyp7+gU1Ng6B/7M=,tag:/66JtHK5Yu7pRxB0b0eifQ==,type:str]
+sops:
+    age:
+        - enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBsaDVycUE4RFpoRjdpTlpX
+            dGpzN3hwRFQ2cmtXVXVzWnZJOXJEZXZRWEhNCkJwbm9QV0lGcGtNRTJqbStrc3l1
+            Q2M4bE1WbzJpTXZQWjJyTGpFS0JYcVUKLS0tIDBvU2U5aEtVTTZUaE85eEkyYitG
+            bGtSVkhKNnRuNlZWMWh6Z1M4VXM1WU0KdusvtM85V0xrO+uJFUY+UH0tuwdF0GiW
+            79J4Rlxk8ne25psKsvwjLYLxZ53xjFHCC4FCHTNkYwTKCDEKjw46Lg==
+            -----END AGE ENCRYPTED FILE-----
+          recipient: age1e5fq3hwxy78psus2nfvmtmua36g0u3suk78ephw6246l974d2utsvn0hla
+    encrypted_regex: ^(data|stringData)$
+    lastmodified: "2026-10-26T02:45:04Z"
+    mac: ENC[AES256_GCM,data:KF7KwXCnNLAg1YI3u0lLI/ho4sITHAq09ac2WO4TK3TCthkuivb89YjhuuJKs0NFhjn6aRLqmZavUqcXH2HujiryqbLNVexOShQM0wSzgCzmWdbi0UzpgJ4KcQA3PufDtsQz4HHLXx396EbZrM3Ie3WSu/PvRm5iWOxzTGCGc9Q=,iv:Eo920oXXD1FLZVJXywZ6C+LRL+qZjmnZXv0+Oa/GMb8=,tag:6LuPVSet4WjvrvGUAxaJlw==,type:str]
+    version: 3.13.2

k8s/argocd/secrets/secret-generator.yaml

@@ -11,6 +11,7 @@ files:
     - agent-pod-ssh-key.enc.yaml
     - authentik-secrets.enc.yaml
     - cloudflare-secrets.enc.yaml
+    - cloudflared-credentials.enc.yaml
     - forgejo-registry-pat-api.enc.yaml
     - forgejo-registry-pull.enc.yaml
     - forgejo-runner-token.enc.yaml