ci: add flake8 lint workflow; fix unused imports and f-string issues

Removes unused datetime/re imports (F401). Removes f prefix from
2 f-strings with no placeholders (F541). Fixes trailing whitespace
and missing newline (W291/W292). Config ignores style-only rules.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.flake8

@@ -0,0 +1,9 @@
+[flake8]
+max-line-length = 120
+# E302/E303: blank lines around functions — relaxed style
+# W293: blank line whitespace
+# E501: long lines
+# F841: unused local variables — intentional in many except/parse blocks
+# E261: inline comment spacing
+extend-ignore = E302, E303, W293, E501, F841, E261
+exclude = __pycache__, .git

.gitea/workflows/lint.yml

@@ -0,0 +1,23 @@
+name: Lint
+
+on:
+  push:
+    branches: ["**"]
+  pull_request:
+    branches: ["**"]
+
+jobs:
+  python-lint:
+    name: Python (flake8)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Install Python and flake8
+        run: |
+          apt-get update -qq
+          apt-get install -y -qq python3 python3-pip
+          pip3 install flake8
+
+      - name: Run flake8
+        run: flake8 . --exclude=__pycache__,.git

ceph_osd_analyzer.py

@@ -17,9 +17,6 @@ import subprocess
 import sys
 import argparse
 from collections import defaultdict
-from datetime import datetime
-import re
-
 DEBUG = False
 
 class Colors:
@@ -586,12 +583,12 @@ def analyze_cluster():
                 print(f"    - {issue}")
         
         if candidate['capacity_factors']:
-            print(f"  Capacity Optimization:")
+            print("  Capacity Optimization:")
             for factor in candidate['capacity_factors'][:2]:
                 print(f"    • {factor}")
         
         if candidate['resilience_factors']:
-            print(f"  Host Distribution:")
+            print("  Host Distribution:")
             for factor in candidate['resilience_factors'][:2]:
                 print(f"    • {factor}")
         
@@ -622,6 +619,7 @@ def analyze_cluster():
                 print(f"  Issues: {candidate['health_issues'][0]}")
             print()
 
+
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(description='Analyze Ceph OSDs for replacement candidates across entire cluster')
     parser.add_argument('--class', dest='device_class', choices=['hdd', 'nvme'],