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/data_source_server.go

@@ -0,0 +1,156 @@
+// Copyright (c) EZSCALE.
+// SPDX-License-Identifier: MPL-2.0
+
+package provider
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"terraform-provider-virtfusion/internal/client"
+
+	"github.com/hashicorp/terraform-plugin-framework/datasource"
+	"github.com/hashicorp/terraform-plugin-framework/datasource/schema"
+	"github.com/hashicorp/terraform-plugin-framework/types"
+)
+
+var _ datasource.DataSource = &ServerDataSource{}
+var _ datasource.DataSourceWithConfigure = &ServerDataSource{}
+
+// NewServerDataSource returns a new data source for reading a single server.
+func NewServerDataSource() datasource.DataSource {
+	return &ServerDataSource{}
+}
+
+// ServerDataSource defines the data source implementation.
+type ServerDataSource struct {
+	client *client.Client
+}
+
+// ServerDataSourceModel describes the data source data model.
+type ServerDataSourceModel struct {
+	ID           types.Int64  `tfsdk:"id"`
+	UUID         types.String `tfsdk:"uuid"`
+	Name         types.String `tfsdk:"name"`
+	Hostname     types.String `tfsdk:"hostname"`
+	OwnerID      types.Int64  `tfsdk:"owner_id"`
+	HypervisorID types.Int64  `tfsdk:"hypervisor_id"`
+	Suspended    types.Bool   `tfsdk:"suspended"`
+	CPUCores     types.Int64  `tfsdk:"cpu_cores"`
+	Memory       types.Int64  `tfsdk:"memory"`
+	Storage      types.Int64  `tfsdk:"storage"`
+}
+
+func (d *ServerDataSource) Metadata(_ context.Context, req datasource.MetadataRequest, resp *datasource.MetadataResponse) {
+	resp.TypeName = req.ProviderTypeName + "_server"
+}
+
+func (d *ServerDataSource) Schema(_ context.Context, _ datasource.SchemaRequest, resp *datasource.SchemaResponse) {
+	resp.Schema = schema.Schema{
+		MarkdownDescription: "Use this data source to read a single VirtFusion server by ID.",
+		Attributes: map[string]schema.Attribute{
+			"id": schema.Int64Attribute{
+				MarkdownDescription: "The server ID.",
+				Required:            true,
+			},
+			"uuid": schema.StringAttribute{
+				MarkdownDescription: "The server UUID.",
+				Computed:            true,
+			},
+			"name": schema.StringAttribute{
+				MarkdownDescription: "The server display name.",
+				Computed:            true,
+			},
+			"hostname": schema.StringAttribute{
+				MarkdownDescription: "The server hostname.",
+				Computed:            true,
+			},
+			"owner_id": schema.Int64Attribute{
+				MarkdownDescription: "The owner (user) ID who owns the server.",
+				Computed:            true,
+			},
+			"hypervisor_id": schema.Int64Attribute{
+				MarkdownDescription: "The hypervisor ID where the server is hosted.",
+				Computed:            true,
+			},
+			"suspended": schema.BoolAttribute{
+				MarkdownDescription: "Whether the server is suspended.",
+				Computed:            true,
+			},
+			"cpu_cores": schema.Int64Attribute{
+				MarkdownDescription: "The number of CPU cores.",
+				Computed:            true,
+			},
+			"memory": schema.Int64Attribute{
+				MarkdownDescription: "The memory size in MB.",
+				Computed:            true,
+			},
+			"storage": schema.Int64Attribute{
+				MarkdownDescription: "The storage size in GB.",
+				Computed:            true,
+			},
+		},
+	}
+}
+
+func (d *ServerDataSource) Configure(_ context.Context, req datasource.ConfigureRequest, resp *datasource.ConfigureResponse) {
+	if req.ProviderData == nil {
+		return
+	}
+
+	c, ok := req.ProviderData.(*client.Client)
+	if !ok {
+		resp.Diagnostics.AddError(
+			"Unexpected Data Source Configure Type",
+			fmt.Sprintf("Expected *client.Client, got: %T. Please report this issue to the provider developers.", req.ProviderData),
+		)
+		return
+	}
+
+	d.client = c
+}
+
+func (d *ServerDataSource) Read(ctx context.Context, req datasource.ReadRequest, resp *datasource.ReadResponse) {
+	var data ServerDataSourceModel
+	resp.Diagnostics.Append(req.Config.Get(ctx, &data)...)
+	if resp.Diagnostics.HasError() {
+		return
+	}
+
+	result, err := d.client.Get(ctx, fmt.Sprintf("/servers/%d", data.ID.ValueInt64()))
+	if err != nil {
+		resp.Diagnostics.AddError("Error Reading Server", err.Error())
+		return
+	}
+
+	var serverResp client.ServerResponse
+	if err := json.Unmarshal(result, &serverResp); err != nil {
+		resp.Diagnostics.AddError("Error Parsing Server Response", err.Error())
+		return
+	}
+
+	s := serverResp.Data
+	data.ID = types.Int64Value(s.ID)
+	data.UUID = types.StringValue(s.UUID)
+	data.Name = types.StringValue(s.Name)
+	data.Hostname = types.StringValue(s.Hostname)
+	data.OwnerID = types.Int64Value(s.OwnerID)
+	data.HypervisorID = types.Int64Value(s.HypervisorID)
+	data.Suspended = types.BoolValue(s.Suspended)
+
+	// Extract nested resource values from the detailed server response.
+	var cpuCores, memory, storage int64
+	if s.CPU != nil {
+		cpuCores = s.CPU.Cores
+	}
+	if s.Settings != nil && s.Settings.Resources != nil {
+		memory = s.Settings.Resources.Memory
+		storage = s.Settings.Resources.Storage
+	}
+	data.CPUCores = types.Int64Value(cpuCores)
+	data.Memory = types.Int64Value(memory)
+	data.Storage = types.Int64Value(storage)
+
+	resp.Diagnostics.Append(resp.State.Set(ctx, &data)...)
+}