Overhaul VirtFusion provider: 20 resources, 30 data sources, multipage pagination

Complete rewrite of the VirtFusion Terraform provider with full API coverage:

- 20 managed resources (server, build, SSH key, user, firewall, IP blocks, etc.)
- 30 data sources (hypervisors, packages, servers, IP blocks, self-service, etc.)
- New HTTP client with proper error handling, query parameter support, and
  automatic multipage pagination via GetAllPages (fetches all pages from
  Laravel-style paginated endpoints and merges into a single response)
- Fixed type mismatches against live API: ServerData.Suspended (int→bool),
  IPBlockData.Type (string→int), PackageData json tags (primaryStorage, etc.),
  ServerData nested CPU/Settings/Resources structure, HypervisorGroupResources
  array response
- Configurable results-per-page (default 300) on all list data sources
- Migrated CI from GitHub Actions to Gitea Actions
- Updated goreleaser config, go.mod dependencies, and examples

Verified against live VirtFusion instance at cp.vps.ezscale.tech:
all data sources return correct data with full pagination support.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

internal/provider/resource_server_ipv4.go

@@ -0,0 +1,160 @@
+// Copyright (c) EZSCALE.
+// SPDX-License-Identifier: MPL-2.0
+
+package provider
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"terraform-provider-virtfusion/internal/client"
+
+	"github.com/hashicorp/terraform-plugin-framework/resource"
+	"github.com/hashicorp/terraform-plugin-framework/resource/schema"
+	"github.com/hashicorp/terraform-plugin-framework/resource/schema/int64default"
+	"github.com/hashicorp/terraform-plugin-framework/resource/schema/int64planmodifier"
+	"github.com/hashicorp/terraform-plugin-framework/resource/schema/planmodifier"
+	"github.com/hashicorp/terraform-plugin-framework/resource/schema/stringplanmodifier"
+	"github.com/hashicorp/terraform-plugin-framework/types"
+)
+
+var (
+	_ resource.Resource              = &ServerIPv4Resource{}
+	_ resource.ResourceWithConfigure = &ServerIPv4Resource{}
+)
+
+// NewServerIPv4Resource returns a new resource for managing server IPv4 addresses.
+func NewServerIPv4Resource() resource.Resource {
+	return &ServerIPv4Resource{}
+}
+
+// ServerIPv4Resource defines the resource implementation.
+type ServerIPv4Resource struct {
+	client *client.Client
+}
+
+// ServerIPv4ResourceModel describes the resource data model.
+type ServerIPv4ResourceModel struct {
+	ID       types.String `tfsdk:"id"`
+	ServerID types.Int64  `tfsdk:"server_id"`
+	Quantity types.Int64  `tfsdk:"quantity"`
+}
+
+func (r *ServerIPv4Resource) Metadata(_ context.Context, req resource.MetadataRequest, resp *resource.MetadataResponse) {
+	resp.TypeName = req.ProviderTypeName + "_server_ipv4"
+}
+
+func (r *ServerIPv4Resource) Schema(_ context.Context, _ resource.SchemaRequest, resp *resource.SchemaResponse) {
+	resp.Schema = schema.Schema{
+		MarkdownDescription: "Adds IPv4 addresses to a VirtFusion server.",
+		Attributes: map[string]schema.Attribute{
+			"id": schema.StringAttribute{
+				MarkdownDescription: "Resource identifier.",
+				Computed:            true,
+				PlanModifiers: []planmodifier.String{
+					stringplanmodifier.UseStateForUnknown(),
+				},
+			},
+			"server_id": schema.Int64Attribute{
+				MarkdownDescription: "The ID of the server. Changing this forces a new resource to be created.",
+				Required:            true,
+				PlanModifiers: []planmodifier.Int64{
+					int64planmodifier.RequiresReplace(),
+				},
+			},
+			"quantity": schema.Int64Attribute{
+				MarkdownDescription: "The number of IPv4 addresses to add. Defaults to `1`. Changing this forces a new resource to be created.",
+				Optional:            true,
+				Computed:            true,
+				Default:             int64default.StaticInt64(1),
+				PlanModifiers: []planmodifier.Int64{
+					int64planmodifier.RequiresReplace(),
+				},
+			},
+		},
+	}
+}
+
+func (r *ServerIPv4Resource) Configure(_ context.Context, req resource.ConfigureRequest, resp *resource.ConfigureResponse) {
+	if req.ProviderData == nil {
+		return
+	}
+
+	c, ok := req.ProviderData.(*client.Client)
+	if !ok {
+		resp.Diagnostics.AddError(
+			"Unexpected Resource Configure Type",
+			fmt.Sprintf("Expected *client.Client, got: %T.", req.ProviderData),
+		)
+		return
+	}
+
+	r.client = c
+}
+
+func (r *ServerIPv4Resource) Create(ctx context.Context, req resource.CreateRequest, resp *resource.CreateResponse) {
+	var data ServerIPv4ResourceModel
+	resp.Diagnostics.Append(req.Plan.Get(ctx, &data)...)
+	if resp.Diagnostics.HasError() {
+		return
+	}
+
+	serverID := data.ServerID.ValueInt64()
+	quantity := data.Quantity.ValueInt64()
+
+	var body interface{}
+	if quantity > 1 {
+		body = client.ServerIPv4AddRequest{
+			Quantity: quantity,
+		}
+	}
+
+	_, err := r.client.Post(ctx, fmt.Sprintf("/servers/%d/ipv4", serverID), body)
+	if err != nil {
+		resp.Diagnostics.AddError("Error adding IPv4 to server", err.Error())
+		return
+	}
+
+	data.ID = types.StringValue(fmt.Sprintf("%d/ipv4/%d", serverID, quantity))
+
+	resp.Diagnostics.Append(resp.State.Set(ctx, &data)...)
+}
+
+func (r *ServerIPv4Resource) Read(ctx context.Context, req resource.ReadRequest, resp *resource.ReadResponse) {
+	var data ServerIPv4ResourceModel
+	resp.Diagnostics.Append(req.State.Get(ctx, &data)...)
+	if resp.Diagnostics.HasError() {
+		return
+	}
+
+	// No dedicated read endpoint; return stored state as-is.
+	resp.Diagnostics.Append(resp.State.Set(ctx, &data)...)
+}
+
+func (r *ServerIPv4Resource) Update(_ context.Context, _ resource.UpdateRequest, resp *resource.UpdateResponse) {
+	// All attributes have RequiresReplace, so Update should never be called.
+	resp.Diagnostics.AddError(
+		"Update Not Supported",
+		"All attributes of virtfusion_server_ipv4 require replacement. This function should not be called.",
+	)
+}
+
+func (r *ServerIPv4Resource) Delete(ctx context.Context, req resource.DeleteRequest, resp *resource.DeleteResponse) {
+	var data ServerIPv4ResourceModel
+	resp.Diagnostics.Append(req.State.Get(ctx, &data)...)
+	if resp.Diagnostics.HasError() {
+		return
+	}
+
+	serverID := data.ServerID.ValueInt64()
+
+	_, err := r.client.Delete(ctx, fmt.Sprintf("/servers/%d/ipv4", serverID))
+	if err != nil {
+		var apiErr *client.APIError
+		if errors.As(err, &apiErr) && apiErr.IsNotFound() {
+			return
+		}
+		resp.Diagnostics.AddError("Error removing IPv4 from server", err.Error())
+	}
+}