Make tests and lint badges clickable links to workflow runs for master branch

[Copilot]

The tests and lint badges in README.md displayed status but weren't clickable, preventing users from navigating to workflow runs to diagnose failures. Additionally, the badges were showing status for all branches instead of just the master branch.

Changes:

• Wrapped tests badge with link to actions/workflows/tests.yml
• Wrapped lint badge with link to actions/workflows/lint.yml
• Added ?branch=master parameter to badge URLs to show status only for master branch

Badges now follow the same clickable pattern as other status badges in the README and correctly display status only for the master branch:

[![tests](badge.svg?branch=master)](https://github.com/ydb-platform/ydb-go-sdk/actions/workflows/tests.yml)
[![lint](badge.svg?branch=master)](https://github.com/ydb-platform/ydb-go-sdk/actions/workflows/lint.yml)

• Fixes dev: README.md badges links to badge svg, but wants to see why lint/test badge is failed #1909

Original prompt

---

This section details on the original issue you should resolve

<issue_title>dev: README.md badges links to badge svg, but wants to see why lint/test badge is failed</issue_title>
<issue_description>This badges links to badge but I want to see why badge is red (failed)

![tests](https://github.com/ydb-platform/ydb-go-sdk/workflows/tests/badge.svg)
![lint](https://github.com/ydb-platform/ydb-go-sdk/workflows/lint/badge.svg)

```</issue_description>

## Comments on the Issue (you are @copilot in this section)

<comments>
</comments>

• Fixes dev: README.md badges links to badge svg, but wants to see why lint/test badge is failed #1909

---

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[github-actions]

summary

Base version: v3.117.2-0.20251025143056-142ad221a585 (master)
Cannot suggest a release version.
Can only suggest a release version when compared against the most recent version of this major: v3.117.1.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 47.07%. Comparing base (142ad22) to head (e702be2).

❗ There is a different number of reports uploaded between BASE (142ad22) and HEAD (e702be2). Click for more details.

HEAD has 23 uploads less than BASE

Flag	BASE (142ad22)	HEAD (e702be2)
macOS	2	0
unit	6	1
go-1.25.x	3	0
ubuntu	4	0
go-1.21.x	5	1
windows	2	1
ydb-latest	1	0
integration	2	0
ydb-24.4	1	0

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #1910       +/-   ##
===========================================
- Coverage   72.14%   47.07%   -25.07%     
===========================================
  Files         390      386        -4     
  Lines       34161    33947      -214     
===========================================
- Hits        24645    15981     -8664     
- Misses       8357    17377     +9020     
+ Partials     1159      589      -570     

Flag	Coverage Δ
go-1.21.x	47.07% <0.00%> (-25.08%)	⬇️
go-1.25.x	?
integration	?
macOS	?
ubuntu	?
unit	47.07% <0.00%> (-0.10%)	⬇️
windows	47.07% <0.00%> (-0.09%)	⬇️
ydb-24.4	?
ydb-latest	?

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[asmyasnikov]

@copilot your fix shows status for any run (tests, lint) or only for master branch?
(Badges in root project page must shows status only for master branch)

[Copilot]

@copilot your fix shows status for any run (tests, lint) or only for master branch?
(Badges in root project page must shows status only for master branch)

The badges now show status only for the master branch. I've added the ?branch=master parameter to both badge URLs in commit 3815174.

The updated badges:

• workflows/tests/badge.svg?branch=master - shows tests status only for master
• workflows/lint/badge.svg?branch=master - shows lint status only for master