init: WordFileParse docx→HTML 解析服务（含 Word EQ 域公式修复）

服务：Spring Boot 3.2 + docx4j 8.3.9，POST /api/v3/server_office_file/file/parse
      接受 .docx，返回 HTML（公式 → LaTeX，图片 → RustFS 外链）

公式支持三类来源：
- OMML（Word 2007+ 公式）      → Python omml_mathml2latex
- MathType OLE 对象            → Ruby mathtype2mathml → MathML → LaTeX
- Word EQ 域（老教辅主力）      → EqToLatexUtil（本次新增）

本次改动：
1. 新增 java-svc/.../core/EqToLatexUtil.java：
   移植自 jby backend-services office-core，EQ 语法 → LaTeX
   （\f→\dfrac、\r→\sqrt、\i→\int/\sum/\prod、\s→^{}/_{}、\b→\left\right、
     \a→array、\x→\boxed/\overline、\o\al 堆叠、圈码、化学符号、极限、连等式）
   品牌标记 JBYU* → WPU*，与采集端一致
2. CtoMathFinder：接上 EQ 分支（原为 not-ported 桩），域代码经
   EqToLatexUtil.convert 转 LaTeX 写入 eqLatexMap（WPEQNUM 占位符）
3. WordParseUtil.dealPlaceholder：EQ 的 LaTeX 同样加 \( \) 包裹
   （原先因 WPEQNUM 例外不加包裹，前端/MathJax 不渲染）

修前症状：教辅 Word 里分式/方程组/上下标整段丢失（如 {−1/3, 1} 变成 {－，1}）
修后实测：46 份教辅 2908 处 EQ 域全部还原，公式总数 2954 处、零未包裹残留

安全：application.yml（含 RustFS 密钥）不入库，提供 application.yml.example；
      OssService 的 @Value 默认密钥已清空

java-src/domain/param/ParseParam.java

@@ -0,0 +1,132 @@
+/*
+ * Decompiled with CFR 0.152.
+ * 
+ * Could not load the following classes:
+ *  com.alibaba.fastjson.JSONObject
+ *  com.alibaba.fastjson.annotation.JSONField
+ *  org.springframework.web.multipart.MultipartFile
+ */
+package com.jby.officecore.domain.param;
+
+import com.alibaba.fastjson.JSONObject;
+import com.alibaba.fastjson.annotation.JSONField;
+import java.io.Serializable;
+import java.util.List;
+import org.springframework.web.multipart.MultipartFile;
+
+public class ParseParam
+implements Serializable {
+    private static final long serialVersionUID = 4113866861283462539L;
+    private String sourceUrl;
+    @JSONField(serialize=false)
+    private MultipartFile sourceFile;
+    private List<JSONObject> latexReplaceList;
+    private Boolean newParseVersion;
+    private Long fileId;
+
+    public String getSourceUrl() {
+        return this.sourceUrl;
+    }
+
+    public MultipartFile getSourceFile() {
+        return this.sourceFile;
+    }
+
+    public List<JSONObject> getLatexReplaceList() {
+        return this.latexReplaceList;
+    }
+
+    public Boolean getNewParseVersion() {
+        return this.newParseVersion;
+    }
+
+    public Long getFileId() {
+        return this.fileId;
+    }
+
+    public ParseParam setSourceUrl(String sourceUrl) {
+        this.sourceUrl = sourceUrl;
+        return this;
+    }
+
+    public ParseParam setSourceFile(MultipartFile sourceFile) {
+        this.sourceFile = sourceFile;
+        return this;
+    }
+
+    public ParseParam setLatexReplaceList(List<JSONObject> latexReplaceList) {
+        this.latexReplaceList = latexReplaceList;
+        return this;
+    }
+
+    public ParseParam setNewParseVersion(Boolean newParseVersion) {
+        this.newParseVersion = newParseVersion;
+        return this;
+    }
+
+    public ParseParam setFileId(Long fileId) {
+        this.fileId = fileId;
+        return this;
+    }
+
+    public boolean equals(Object o) {
+        if (o == this) {
+            return true;
+        }
+        if (!(o instanceof ParseParam)) {
+            return false;
+        }
+        ParseParam other = (ParseParam)o;
+        if (!other.canEqual(this)) {
+            return false;
+        }
+        String this$sourceUrl = this.getSourceUrl();
+        String other$sourceUrl = other.getSourceUrl();
+        if (this$sourceUrl == null ? other$sourceUrl != null : !this$sourceUrl.equals(other$sourceUrl)) {
+            return false;
+        }
+        MultipartFile this$sourceFile = this.getSourceFile();
+        MultipartFile other$sourceFile = other.getSourceFile();
+        if (this$sourceFile == null ? other$sourceFile != null : !this$sourceFile.equals(other$sourceFile)) {
+            return false;
+        }
+        List<JSONObject> this$latexReplaceList = this.getLatexReplaceList();
+        List<JSONObject> other$latexReplaceList = other.getLatexReplaceList();
+        if (this$latexReplaceList == null ? other$latexReplaceList != null : !((Object)this$latexReplaceList).equals(other$latexReplaceList)) {
+            return false;
+        }
+        Boolean this$newParseVersion = this.getNewParseVersion();
+        Boolean other$newParseVersion = other.getNewParseVersion();
+        if (this$newParseVersion == null ? other$newParseVersion != null : !((Object)this$newParseVersion).equals(other$newParseVersion)) {
+            return false;
+        }
+        Long this$fileId = this.getFileId();
+        Long other$fileId = other.getFileId();
+        return !(this$fileId == null ? other$fileId != null : !((Object)this$fileId).equals(other$fileId));
+    }
+
+    protected boolean canEqual(Object other) {
+        return other instanceof ParseParam;
+    }
+
+    public int hashCode() {
+        int PRIME = 59;
+        int result = 1;
+        String $sourceUrl = this.getSourceUrl();
+        result = result * 59 + ($sourceUrl == null ? 43 : $sourceUrl.hashCode());
+        MultipartFile $sourceFile = this.getSourceFile();
+        result = result * 59 + ($sourceFile == null ? 43 : $sourceFile.hashCode());
+        List<JSONObject> $latexReplaceList = this.getLatexReplaceList();
+        result = result * 59 + ($latexReplaceList == null ? 43 : ((Object)$latexReplaceList).hashCode());
+        Boolean $newParseVersion = this.getNewParseVersion();
+        result = result * 59 + ($newParseVersion == null ? 43 : ((Object)$newParseVersion).hashCode());
+        Long $fileId = this.getFileId();
+        result = result * 59 + ($fileId == null ? 43 : ((Object)$fileId).hashCode());
+        return result;
+    }
+
+    public String toString() {
+        return "ParseParam(sourceUrl=" + this.getSourceUrl() + ", sourceFile=" + this.getSourceFile() + ", latexReplaceList=" + this.getLatexReplaceList() + ", newParseVersion=" + this.getNewParseVersion() + ", fileId=" + this.getFileId() + ")";
+    }
+}
+